Mirror’s Edge: Short?

We’ve not yet played Mirror’s Edge for ourselves, but some have already finished the game.  According to the poster, the game’s 9 levels take about 5 or 6 hours on the first playthrough but are possible to complete in around 75 minutes when going for time trials.

This doesn’t particularly bother us, we’re all for shorter, more intense game experiences now we’re getting old, but it might interest some.