Potentionaly Source 2 development started 2011. To have a stable devkit you need at least 2-3 years so the 2013 theory isn't bad. However they have to rebuild most of the stuff. Buy it wont be a dog-year, since they probably have most of the stuff down back from the ep3 dev-days. Nonetheless...
Oh and I would like to add that I have 300 euros saved up so that I can pre-order hl3 the moment it will be open to pre-orders. The rest of the money saved is for any hadware upgrades, should they be necessary.
YEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEES. First time its a mistake, second time its a pattern. This Jira thing is TOTALY teasing, since this time there were very few things changed, INCLUDING HL3 CORE and more hl3 devs. This is plain teasing...
Well lol. Also, indiegogo? why indiegogo? Anyways, it is a stupid idea. Valve has more than enough money, especialy after steam summer sales. Also the tf2 market and dota 2 market is making valve big money. So.... no bad idea.