I have to echo your assesment exactly Big Mac.
My neighbor has a 800 xp, I have a 06 Attak. We've switched sleds, and re-ridden the same length of trail.
Mine felt more "car" like, if that makes sense. His felt more "dirt-bike" like. Both in my opinion are similar power wise. We've yet to race, and frankly either one of us cares, they are both insanley fast.
His comments were this - "you have no idea how fast your going until you look at the speedo" "freak this thing sounds awesome!" and, over the trail we rode that night "the Apex is smoother" And my Attak was smoother, I could tell because of my helmet shaking while riding his. Now, granted I'm going into my third year with my sled, he just got his, so he has not played with his suspension at all. Fair is fair.
If i were to run off trail only, then his XP seems kinda fun. But on groomed trails, honest, I'd stick with mine. His seemed "twitchy" for the lack of better words. Was it comfartable? yes, but no more than mine. Was it smooth - no, not a chance. My Apex seems to start with authority, his XP seems to be a sleep, almost like it's begging to be pounced on, or shut down. Fuel Injection is awesome, period.
We've been through some tight and twisty's so far this season. Honestly, when I knew he bought his, I was worried about keeping up with him (not that we are that fast, we're both in our early 40's) But I think I've learn't something, after reading the rags and the net. Don't buy into hype. Trust me, I'm not brand loyal, my ATV is a Bombardier. But I was almost "nervous" about his new sled, how the hell could I keep up? I'm here to say you can keep up just fine. I've done it.
If I had all my money back, and I could buy any sled I wanted today. Honest - it would be a toss-up. My neigbour feels the same way. If I were young and wanting to bump trails and jump it, hands down I'd go with the Rev, but then again I'd probably choose the TNT. For riding groomed trails, lake running, I'll keep mine. No oil, car like reliability (his XP had the hand warmers stop working within an hours use, his gauge only partially worked, his seat can be removed with a firm slap of your palm - fit and finish is no comparison) In saying that, my hand warmers aren't great, either, so nothing is perfect.
I hope all manufacturers keep competitive, and the XP might just be the best thing to happen to Yamaha. It keeps them on their toes.
But for a 100 kmh down a slightly stuttery groomed trail on a Saturday afteroon, my Attak is my choice.