It could. It didn't break it down. Tulsa falls below Rice too according to US News.
***edit
Yes it does break them down:
Tulsa - 2,987
Rice - 3,051
Xavier - 3,961
Wake - 4,412
I don't know if this is the 2008-2009 figures or not, but I could see the schools going back and forth depending on the year though.