I've seen low 13's to 14.0's at my local track from LS1's. Some are quick and some have a little less "get up and go" to them. Point is, he won and it was a street race. Anything can happen in a street race - do I sound like a broken record here?
In most cases, that same race would have probably gone the other way. Just enjoy the win, and oh,....start modding that LX!!!
E
------------------
1991 5.0 LX Coupe -37,800 miles
13.17 @ 106.14 mph w/ 2.138 60'
Pro-Charger D-1SC on the way!!!