see his review of the product here
"...the next thing you'll notice about this new release is the speed...you
get it included in the software. It's speed where it counts too. Faster
moving around the timeline... Faster reactions when moving things to
and from bins as well as better responsiveness when navigating menus
and settings. But most importantly is more speed with all things
related to that timeline."
"To sum up ... Avid Media Composer 3
is a must update for Avid users. The speed alone makes it worth the
price of admission. ...So if you are an Avid user grab your checkbook and
get version 3."