No way. I spend a lot of time in DOS and I'm in my BIOS several times per week and I'm not going to shut down, swap cables around and reboot every time I need to do this. My Radeon 7500 and 8500 DVI works fine, if they can't design the 9000 to work other than when Windows is loaded, they can keep their card. Which they did. I tried three, hoping that it was a defective card but they all worked the same. It makes me leery about getting a 9500 or 9700 if the DVI is going to work the same way as the 9000.
I've spent a decent amount of time using a system with an 8500le which can have sync issues with DVI-D output in combination with a Philips 17" lcd. The simple solution was to hook up both the VGA and DVI interfaces to the philips display.
DVI and most LCD digital interfaces were really designed to be used at a fixed resolution. Generally the digital interface scaling is pretty poor. For example when running at odd resolutions such as 1280x960 ( the only 1280 option for Counter-Strike) the digital scaling will result in noticable artifacts ( I've seen this with a variety of video cards and LCDs). In general the analog scalers are much better than the digital scalers. Although in both cases ( digital and analog) you will get a much better display using the prime resolution.