Hi Homer,
I was looking for a thread like this a couple months ago hoping to read some anecdotal experiences and didn't find any that were helpful. All I found were DO students in the "score report" threads, and all of them seemed to have done exceptionally well on both tests. So I'm going to tell you my experience, but of course pull out the usual grain of salt when reading this, and hopefully others will comment and this thread will be helpful to you and others in the future.
I took the USMLE one week before I took the COMLEX. I am generally a good exam-taker, and felt ready for the exam. My reasons for taking it were based on curiosity about what MD students are tested on, hearsay about its necessity in my residency applications depending on what I wanted to do, and my undecided status with regards to future residency selection.
So here's the part where I get sheepish: I caught a stupid cold two days before the exam. Initially, I didn't think this was a big deal. I've taken tests while sick before and have always come through just fine. However, I show up to the testing site, and am informed that I cannot bring Kleenex, cough drops, or my inhaler into the room with me. I managed to talk the guy into letting me bring in one Kleenex, which he inspected, and one cough drop, which he only allowed after inspection and if unwrapped. We've all had the bad colds before, and I think everyone knows that these supplies are insufficient for an 8 hour period. Consequently, I was rushed and uncomfortable, and really, learned that I need to recognize when enough's enough and just take a sick day once in a while.
I did pass, but my score is pretty bad (205/83). Now who knows - maybe I would have done this poorly anyway. I don't like making excuses, but I do think that the snot on the upper lip and constant throat tickle didn't help.
I took the COMLEX one week later, and did the complete opposite (629/93).
So time comes to apply for residency, and I decided on allopathic internal medicine residency programs. So what do I do? I talked with my advisor and decided to make my initial application with only my COMLEX scores. I didn't fill in my USMLE ID on the ERAS application. I will carry a copy of my scores, and will produce them if asked. If I am not getting interview invites, then I will also submit my USMLE scores via ERAS. I decided to wait until the Dean's letter is released, and release my scores to places that I didn't get interview invites from. If they aren't going to invite me anyway without them, what can it hurt?
So that was my plan. 14/19 places that I applied to "required" USMLE scores on their websites. (Notable exceptions were Colorado and U-Wash, also Spokane, Beaumont, and one other place). As of right now, I have 8 interviews scheduled, only one of them was a place that specifically stated on their website that they accept COMLEX instead.
So it's working out ok. Looks like I might not need USMLE scores to get the residency that I want. But I have to say, in hindsight, I wish that I had made a more informed decision before taking the test. Since I didn't know what I wanted to do, calling programs to find out their requirements wasn't exactly an option. The advisors at my school told us we didn't need them, that they would be "used by programs that don't want DOs to discriminate against us". My opinion on that differs, so it was hard to put alot of stock in the advice we got in that lecture.
Maybe this situation doesn't happen to alot of people. I'm not really a "score-sharer" though, so I don't ask how other people did and thus don't have other anecdotal info. I just know I wish I hadn't taken it at all, because I feel this pit in my stomach about not making my score part of my application. If I was an MD student, sick or not, I wouldn't have this option. It seems unfair to me.
Anyway, that's what I did.
As for being tired, I felt great one week later and after that experience, the COMLEX was a nice relief. I had the opportunity to review between, but not lose my initial "peak", and I had the summer off from studying for big exams.