Here's a list of the top 15 bone stock LS2 GTO drag times that have been posted at ls1gto.com. Notice that while the e.t. varies some, trap speed is pretty consistent at 108 mph (+/- 1 mph or so - the slower mph cars are more than likely automatics).
LS2 Stock Classes:
1) PhantomGoat06 12.88 @ 108.9
2) NYTIGER 12.920 @ 109.40 MPH
3) Boilermaker GTO 12.9299 @ 106.89 MPH
4) 05torridred60 12.971 @ 108 MPH - SAP mufflers
5) jumbojet 12.974 @ 108.08 MPH
6) BlackSheep 12.98 @ 108 MPH
7) GTOboss 13.007 @ 108.52mph
8) KYGTO 13.035 @ 108.96 MPH
9) Judgethis05 13.036 @ 108.72
10) hookmechanic 13.074 @ 106.76 MPH
11) SLoW SHO 13.082 @ 108.15
12) SloNlo 13.086 @ 108.75 MPH
13) TheCamel 13.112 @ 108.49 MPH
14) BadGTO 13.14 @ 104.99 MPH
15) Lord Vador 13.132 @ 108.85 MPH
http://www.ls1gto.com/forums/showthread.php?t=106613
Obviously, driver skill plays a big part as even I've seen some run in 14's with poor driving. These cars are difficult to drag race with the 6 spds.