I can't go back to the low contrast and washed-out look of matte screens unfortunately. The nano texture isn't terrible but I'd only use it if I had to work with a bright window or other lighting source behind me. If you go to an Apple store you can A/B test glossy vs. nano-texture and glossy wins for me.
Yeah, what on earth. Go back to one of these old displays, I guarantee you want to gouge your eyes out at how terrible they are. 2006 should put you firmly in 720p land.
They were absolutely noticable. Contrast was crap. I immediately went with glossy with my next MBP around that same period.