You'll find that the schools people casually drop in with that phrase are by and large tier-1 schools. While most people who went to school to learn just use the latter phrase. The lesson is that when you go to Harvard of Princeton or wherever, you didn't go to College, you went to some place that transcends mere college, you went to someplace with an important name, and because of that name, you too are important.
Hell: here it is off of the USNews list using google
"When I was at Princeton" - 16.3 million
"...Harvard" - 5.93m
Yale - 2.58m
Columbia - 3.53m
Stanford - 2.44m
University of Chicago - 6
MIT - 18.5m
Duke - 1.37m
University of Pennsylvania - 1.81m (without "the" - 2 results, "Upenn" 201,000, "Penn" - 13.3m)
California Institute of Technology - 1 ("CIT" - 6, "Caltech" 887,000)
Dartmouth - 691,000
Johns Hopkins - 6.14m
Northwestern - 6.64m
For reference:
"When I was at College" - 9.46 million results
"in college" (exact) - 29.4m
"at college" (exact) - 7.88m
"at university" - 31.4m
"in university" - 7.050mHere's the Tier-2
Ashland - 860,000
Barry - 843,000
Benedictine - 95,300
Bowie State - 2 (Just "Bowie" - 249k)
Cardinal Stritch - 4
Clark Atlanta - 6
Cleveland State - 6
East Carolina - 1.62m
East Tennessee State - 3 ("East Tennessee" - 3)
Florida A&M - 3
Florida Atlantic - 3
Florida International - 3
Georgia Southern - 877,000
Georgia State - 1.65m
Indiana State - 1.28m
Indiana University of Pennsylvania - 2 (Indiana University - 5.07m)
Jackson State - 466k
Lamar University - 0 ("Lamar" - 441,000)
edit, words, Penn and tier-2Depends on who you hang out with, I guess. In my own crowd I find the subject of where you went to college (or even if you went) basically never comes up. But then again, there's that old joke:
"How do you know when you're talking to a Harvard man? He'll tell you."