Let's share our experience.
Before panda/pinguine updates if I had an exact domain (.com, .net, .org) 10 to 20 results in google was guaranteed for my website in about a week one or two.
After panda/pinguine updates i started two niche website (May 1-5, 2012). They are in serp; one of them is in 100 results, the second in not.
Have you started new websites recently (after google updates) and what are your results now?