Gellino, the difference between enrolled and admitted students at Reed for the Class of 2011 was ... 20 points.
The press release of 2007 stated, "The average SAT (1410) and ACT (31) scores of the admitted class are slightly higher than in previous years."
See:
Reed College | Reed College admits 1,112 Students to Class of 2011 from a Record-Breaking Applicant Pool
They admitted class with a 1410 average SAT and enrolled a class with a 1390 SAT (according to the official CDS.)
All is well in Reedland. Compared to Middlebury's "what do you want my number to be this year?" academic reporting of admissions and SAT scores, Reed seems to be as open as they are consistent.