I've been installing apps onto the new Momentus XT 750GB drive I bought 2 days ago. CS5.5 Suite normally takes ~55 minutes, but the time indicator read a very atypical 148 minutes. It started to go down, but has stabilized at 111 minutes as of this point, but just went back up to 117. Never, in any CS5 install, has the installer ever reported over 100 minutes. Even a restore of 200GB, which I knew would take time, remained at "about 3 hours remaining" and took far more than an hour to get to "about 2 hours remaining", so even network transfers are seemingly slower; I can rule out the optical drive... A web search revealed nothing of substance... but http://www.laptopmag.com/reviews/storage/seagate-momentus-xt.aspx does say large files can be a drag... most of my files are <50MB, with only three VMs really taking up gigabytes of space... apart from installer files downloaded as there was no DVD option... that article suggests an issue, but I don't think that's a sufficient explanation; Adobe installs typically take 50~70 minutes. Never 90~117(or the brief '148')... Drive Genius 3's sector scan checks out fine. Could this model just be slower with write access? I did install Snow Leopard and then upgraded to Mountain Lion over it... in both cases, the installer would read "29 minutes..." , go up to "34" minutes", stay at "34 minutes" for a few minutes, and then would remain accurate... something seems amiss. Is this just normal drive write performance (read times are phenomenal) or did I put a bad unit into the shopping cart?