Mine either. I use my N900 heavily for email, web and phone every day. For the hardware it's running, I think battery life is very reasonable. Very approximately speaking, at least on par with an iPhone 3GS and definitely better than the G1 it replaced.

As you said, user settings have a major impact on battery life. Also, location and coverage is a huge factor. If the signal is weak or intermittent, it will use up a lot of battery constantly searching for a signal lock. Because of these factors, meaningful battery life comparisons in ordinary use are hard to make unless settings are exactly the same and units compared have equally strong signals, preferably on the same provider.

Which makes my statement above comparing the N900, iPhone and G1 fairly worthless...except I have extensive experience with both the N900 and G1 in the same conditions and on T-Mobile. Limited iPhone experience. So take any such comparisons - including mine - with a grain of salt.