lol Well I found a few DVDs that definitely exhibit the slow read speed issue - X-Men 2, Twister, and Die Another Day. Funny thing is all had DTS and RCE protection. Probably unrelated, but a funny coincidence.
Twister and X2 wanted 20+ minutes to rip, and Die Another Day ripped about the same as the normal firmware, except I could hear the drive spin up for a few seconds then slow back down. This cycle repeated, so I figured it was bad to let it go that way.
Interesting though, when I tried a transfer rate test in Nero CD/DVD Speed with these discs, they read up to 16x. When I tried to rip in CloneDVD2 is when I had the slowdowns.