Perhaps. All I can tell you is that I have both a pre-production N900 from the summit and a production N900. The pre-production unit rebooted a total of three times while running the pre-production firmware and not once on the production firmware. The production N900 has not rebooted.

I keep Mauku open for Twitter. I browse the web, sometimes with five, six, or more browser windows open at once. I sometimes keep Google Latitude or GoWalla open to share my location. I listen to audio from local files and streaming from the Internet. I watch video clips. I check four IMAP and one POP3 account for email every five minutes, plus have MfE synchronizing email, calendar, contacts, and tasks with an Exchange 2007 server. I take and share photos. I stay logged into AIM, ICQ, Jabber (GoogleTalk and Ovi), MSN, SIP, Skype, and Y!M and have location updates enabled for them. I keep Extras-testing enabled and install available updates from it. I have installed items from Extras-devel and SDK/Tools.

I don't know what kind of user that makes me. In the past, I've been told I'm not a power user. Regardless, if you have a load set you suspect will reliably reboot N900s, I'm interested to hear it.