significant easter egg in latest left 4 dead pc/mac update

[Danny]

So in the new blitz map take gnome chompski to a closet near the safe room and surprise, surprise you enter the aperture science training facility, portals, speed gel, glados and all. plus a few extra surprises if you are a quick eye. I wondered what the shit was in that 11gig update. How rad is this? Man am i glad i made the switch from the scrub xbox version to the mac version.

[CoinReturn]

Isn't this a community made map? I don't think Valve had anything to do with it: http://www.neogaf.com/forum/showthread.php?t=435942 And damn, an 11GB update is ridiculous no matter what platform.

[Danny]

i know right? i opened up steam, wondered why it was so goddamn slow and whent "what could i possibly be downloading in a 11gb patch!"