At 30 seconds, the HTC animations appear.
At 60 seconds, the SenseUI home screen has appeared and you're all ready to start using it.
Install tons of apps that auto-start with the phone, and expect the home screen to take longer to appear. (Although I haven't personally ran into that problem.)
ETA: Oh yeah, and three and a half minutes to wake up from standby? lol. I call BS on whoever said that. You press the hang-up button to wake it up, and the lock screen appears in less than a second. Even if it's been in standby for hours.