Wow, this batch is bubbling away. I've got bubbles about every 3-4 seconds and the bubbels started less than 8 hours after pitching the yeast.

I can't think of anything I did drastically different this batch than last except the way I cooled the wort. I'm not worried about it. Just an observation.
[Edit] Oh, and I used a whisk to aerate the wort just before pitching.....