wpDiscuz is very fast. My page loads are .49 sec without wpDiscuz and only .54 sec with it turned on. Doesn't matter how many comments as it doesn't need to load them all. However, with Media Uploader it jumps to 2.5+ seconds whether I have 1 comment or more. Queries go from 85 to 139 + 1 additional for each comment, no matter how many comments are set to display.
Has Media Uploader load times and queries been looked at?
Cheers,
Adam