I *LOVE* the tight ThinkPad hinges. I have a T42p 15" and a T60p 15" 4:3 and they both require two hands to open.

Just because they only have one latch release doesn't mean it doesn't require two-handed operation...if there were two latch releases, then you'd need three hands, or you would need to re-locate one after pushing up the screen a little to prevent the latch from re-latching.
With both the T42 and the T60, I can probably get the screen up 2/3rds of the way single-handedly, but then the base starts to come up with the screen.
I feel that this is a far lesser evil than loose hinges, or hinges that get looser over time to the point where the screen is "flopping" around. Compaqs (at least the pre-HP ones) are notorious for this, I've seen Dells do it, too, and we have some cheapo Toshibas at work whose hinges are also pretty bad.
I'd say it's "normal." If you feel like risking your warranty, though, I'm sure you could get in there and loosen them up yourself.
-- Nathan