An added factor to that is the high approach speed especially on Flaps 30!
As far as i know only the -800 and -900 have increased approach speeds to limit body angle and reduce the tailstrike risk. The -700 actually has quite low approach speeds, especially if compared to the -300 which has nearly the same size. Usual speeds for us on the -700s are 118 to 130, on the -300 124 to 140. Which is why i personally prefer the NG into very short fields.