Same story goes for most of these hybrids, it'll take well over 100k miles to payback the difference the car cost you up front. Your probably doing good at that point if the batteries are still up to par.
On a side note.....
2009 Cadillac Escalade Hybrid Pricing and Information
That might be the stupidest thing I've ever seen
#1 - If I can afford a 60k mad pimp SUV do you think I'd care how much gas it uses?
#2 - It's 15k or so more for the hybrid so you could buy a Civic instead with the difference