brinked - 4:00 pm on Apr 13, 2010 (gmt 0)
Caffeine is not completely rolled out. I dont think google ever fully rolls out any update in a day. I still see old SERP's when logged in to gmail, if I logout I see caffeine so this is a sign that its still not 100%. If all goes well, they will probably announce something next week, they are not going to announce anything right now in case they have to rollback for some reason.
My prediction was some what right, I knew it would be rolled out on a Tuesday, whitenight owes me a prize.