Originally Posted by zima_182
12 hours probably isn't ideal but I'd say 12 hours is way better than none at all. It will at least get the yeast active somewhat before you pitch.
Just my .02¢
This is also what I find.
I tend to wait and decide to brew just a day or so before. I often don't really leave the yeast on the plate long enough.
At 12 hours, I'm not sure how much you amplify your count, but I think it's worth the extract. Much less than 12 hours and I'm not sure I'd bother.