My 2 cents, DO friendly with +.
10.0 - Uber competitive
Need to be a "better" allo student to go allo for these usually
Derm
Rad Onc
* wasn't that hard a match a decade or so ago
Plastics
9.0 - Most Competitive
Infrequent DO/IMG in allo residencies, in reach of many allos, have always been more exclusive matches
Ophtho
Uro
ENT
Ortho
Neurosurgery
8.0 - Very Competitive
These two have way more IMGs than the 9.0 fields and just way more spots and community programs compared to the 9.0 fields
Rads
* wasn't popular a decade or so ago
GS
* frequently a backup plan of 9.0 fields, wasn't popular again until the 80h work week started
7.0 - Moderately Competitive
In reach of most allo grads if not picky where - frequent IMG/DOs
Anesthesia +
* possibly bumped up if trends continue, couldn't get anyone to touch it maybe 15 years ago
EM +
* had a bump with the tv show ER, down a bit now
OB/GYN +
* was even fairly recently 1/3 IMGs, less now, used to be really competitive back "in the day" before the litigation crisis
PM&R ++
* was fairly recently also very IMG friendly, but now not so much, has always been super DO friendly
6.0 - Somewhat Competitive
Fields with many IMGs
Neurology +
Path
5.0 - Somewhat less than Somewhat Competitive
A field for whatever reason with fewer foreign graduates and DO friendly
Peds +
* IMHO the hardest of the PCP specialties
4.0 - Less Competitive
In reach of almost everyone
IM ++
Psych +
3.0 - Not Very Competitive
FP ++
With all this being said, of course, we had many of our strongest graduates (from my allo school) go into internal medicine and some less stellar graduates go into the 9.0 and 8.0 fields so I am not sure what this all means.
http://residency.wustl.edu/ - is not necessarily accurate as there is a lot of self selection in competitive fields, but a good reference nonetheless