You actually gain more base girth than anything when clamping. Some believe it is due to the reverse pressure the clamp is causing on the penile tissue. I don’t really know for sure though.
one month in (as of 02/12/09): 8.15" BPEL, 7.4" NBPEL, 5.6"EG, (5"-6.5" varying) FL, 4.75" FG, Height: 6'1", Weight: 190 lbs.
Currently (as of 04/3/09): 8.50" BPEL, 7.6" NBPEL, 5.7"EG, (5.5"-7" varying) FL, 4.75" FG, Height: 6'1", Weight: 175 lbs. (final semester of Computer Science > Gym :( )
Goals (in the next 6 months): 8.60" BPEL, 7.8" NBPEL, 6" EG, 7" FL, 5" FG, (still hopefully 6'1"), Weight: 200 lbs.