Congratulations on the new bike. When I stop doing track days with my RR, the XR would be a very tempting next ride.
Granted I'm still green, having been away from real riding, for a long time, and never being that fast, but there's a coach with TPM that is impossible for me to keep in sight, on the track. He has a red XR, I have a 15 RR. He's a nice guy, but it does indeed hurt the stones, when I've been 2-3 laps on the track, and confident enough to really start pushing myself. I start believing I must be improving, because nobody's passed me in the last 2-3 corners. Then a red blur comes by me on the outside, and it's "that guy" who's got a couple years, pounds on me, and I have a machine that (to the naiive, on paper) should make up for the deficiency in skill/experience compared to the XR with more HP, less weight, better suspension.
I love my bike, and don't regret buying it. My point is, don't let the market the XR is aimed at deter you, as I personally know of one guy who rides the wheels off of one.
Oh, one more stone bruising, I passed him once on the straightaway, past halfway, and damn it, if that ole boy, outbraked me just before turn 1!
Now, I only pass him, if I can get by him in the first third of the straightaway, it's the only place I can get close enough.
Still having fun, but taking my lumps from him, and another coach on friggin Ninja 250.