I raced my buddy at Stage 1 in his lightly modded LS1 Trans Am( CAI, flowmaster)--and he was impressed. From a dead stop, 3k launch (he launched too) I had about 2 cars on him, he quickly narrowed the gap and passed me at about 70mph, but his jaw dropped---he had no idea my car would stand that much of a chance. He really thought he was just gonna blow my doors off. Which seems to be the standard with a lot of LS1 guys--he was big into LS1.com for years.
Recently, I took him for a spirited run in my Stage 2, and as hard headed as he is about his car, admits that he is scared to race me again.
It seems that imports fear the wrx, but the V8s think its a pushover.