Stephanie, I think those times may be the standard Boss 302? If I'm not mistaken, the Laguna Seca version of the Boss 302 turned below 1:40? A quote from Motor Trend:
"As its hot shoe, Ford brought 2010 Rolex 24hrs Daytona GT class winner Jonathan Bomarito, so we took the opportunity to gather some hard data on what the Boss could really do. Bomarito and the Boss knocked out two hot laps at 1:40.4 and 1:40.2.
How fast is that? Well, we compared those times against a few vehicles from our MRLS lap-time database and were astonished. With a professional racing driver behind the wheel, the 2009 BMW M3 that competed in our 2008 Best Handling competition clocked a 1:42.9. In our 2009 Best Driver's Car competition the 2010 Shelby GT500 lapped in 1:44.3 while a 2010 Audi R8 did it in 1:40.8. This puts the Boss 302 in a very elite field, and it's not the fastest Boss. According to Ford, Bomarito lapped the Boss Laguna Seca under 1 minute and 40 seconds."
Read more:
http://www.motortrend.com/roadtests/coupes/1102_2012_ford_mustang_boss_302_test/laguna_seca_lap_time.html#ixzz1MN6w9Vd7