Every time I look at statistics for SP games, I have such a hard time understanding why so many people don't even play the game they bought. According to the graphs barely half the people that bought Ep2 have played it for more than 4 hours, and not even half have finished the game. Even less people have completed Ep1 compared to Ep2, with that number being between 38% and 50% (according to the stats page). It just confuses me why people would bother to buy a game if they weren't intent on finishing (or even playing) it, not to mention that Ep1 and Ep2 are arguably some of the best SP experiences available.
Off subject, but has anybody else found the LOST easter egg yet? There's also a HL1 style H.E.V. recharging station panel that I found recently that I think is also an easter egg.