I actually had the exact opposite problem. EP1 would constantly crash due to Windows errors, while EP2 ran smooth and beautiful.
Rob, I'm with everyone else in completely disagreeing with your review. So much so, that I feel your 6.5 does the game no justice. Compared to EP1, which felt like an add on that Valve finished on a whim, EP2 was epic. Sure there were moments where you didn't need your gun out (in fact I played much of the game with just the gravity gun, a fact that I thought was particularly brilliant on Valves part - moving away from mindless shooters) but that just added to the games fun. Not to mention, that the 'lulls' provided some of the best story telling in recent gaming and on top of that, EP2 did all of its story telling without falling back on continual cut scenes and instead passed on all the information and story through dialog with Alyx.
Your article also failed to mention just how breathtaking the game looks and feels. You always read about games trying to be 'cinematic' but EP2 actually was. From the scripted events to the battles to the AMAZING cut scenes EP2 grabbed hold of the player and made them feel they were in the game, not simply detached and shocked by great graphics.
Rob, sorry to say, but I think you seriously missed the boat with your review. To anyone else reading this forum, disregard the review of the game, go out, buy Orange Box and enjoy the ever-lovin-gravity-gun outta EP2.