Mark, I think it's wonderful that you have a really positive attitude and think that everyone can obtain good scores on the GRE.
However, I'm with the OP on this topic. Not everyone can 'defeat the GRE gatekeeper'. Some people cannot do well on these tests no matter how smart they are. Take me for example... I can't do multiple choice/short answer exams. You give me a written test, I'll ace it. I had several classes like this in undergrad... I would fail the MC part of the exam and get in the high 90's for the written component.
As for stating that if someone has a physical or cognitive limitation, that they figure out what the issue is and address it... that's really really naive and quite offensive. I will be bold here and speak for all the disabled students taking the GRE (I have a head injury), I have figured out what my issues is, I have addressed the issue, but I cannot repair the damage in my head in order to regain my cognitive functioning to the point where I can 'ace' this exam.
This doesn't mean I'm not smart, I am. This doesn't mean that I shouldn't go to grad school, I have my masters and did better than most students in my cohort. This doesn't mean that I haven't tried, studied and learned strategies to get your around 1300. 1200 is the highest I've scored, but I'm confident it won't get better than that.
I am quite offended that you would be arrogant enough to state that smart people who don't score well would be able to 'defeat the GRE gatekeeper' if they tried harder or learned strategies. I am even more offended that you would include people with disabilities into your little theory.
We all know that you are fantastic as you provide your stats and application results more than anyone in this forum. However, I think it may be good for you to step back from this situation for a second (and your pompous arrogance) and realize that not everyone is as picture perfect as you in your ability to raise your scores and do all the things that you do.
I totally understand that everyone is going to go, Oh my god WK you're so harsh... but serious, you pissed me off. Being completely egocentric here, it's people like you who create barriers for people like me when they are completely unjustified.
/rant
PS. I'm really pissy today