Generally I don't really pay attention to these kind of threads, but I've been seeing MAJOR increases today and yesterday on 30+ of my sites. Hit several top 1 spots for very competitive keywords and numerous top 3 spots. Some sites haven't even been properly set up yet, so I have some around the clock work conversion optimization to do, lol.
Not sure what to make of it, but I'm seeing these increases irrespective of the link building techniques used. If it's Penguin it seems like an actual update instead of a plain refresh.
Anyone else noticing major fluctuations?