Life, to answer your question, all instructors are not created equal. Most of them view the initial session as a time to show you the line on the track that you want to follow to get the best speed and maintain control. Many of them don't drive Vipers, but if a guy knows the track, that is valuable advice. I wasn't at VOI 11 and I don't know if it was indicative of a typical track instructional experience. I get it that you don't want to waste your money. You can go to High Plains Raceway in Byers (60 miles from Denver east on I-70) and pay $100 for a day of fun and learn from watching/following, etc.. You can't beat that. I would be glad to give you some free instruction, or do some drive and follow with you.
Let's face it, 'spirited' driving is to get the adrenaline rush it provides. I can tell you via personal experience (plenty of it, with Vettes, Porshas, Ferrari, Viper, bikes, snowmobiles, 4x4s, etc) that you will get ten times the adrenaline rush at the track because you have the opportunity to go balls out for 15-20 min at a time. You like to face off with other guys? The track is a constant face-off in the higher levels of driving. Nothing really like it that I can think of. I often think to myself 'its so much fun, how can it be legal?' LOL. Where can you do that on the street?
When you are emersed in the world of high performance driving, you see and hear of a lot of bad 'shunts.' Safety becomes an ever increasing concern as performance levels go up. I don't feel 'safe' driving spirited on the roads, there is just too much traffic and too many surprises. I want to know when I go around a corner at 100 mph that there isn't an obstruction on the other side. Flag workers give me that confidence. Knowing the track gives me that confidence. That just doesn't exist on the street. I only worry about the souls behind the wheel, and especially the souls in the other vehicles that don't bargain for the risk when you are out there on public roads. Make sure the road is vacant. If you can't see around a corner, assume there is a large rock or car in your lane. To assume it is clear is a fool's paradise. Maintain control (slow enough to safely avoid that rock or car) or you will be in for a 'shunt.' Shunts are NOT fun.
PS-do you like to work on Vipers? I could use an extra set of hands this afternoon! Come on up to E'green.