driller41 - 3:51 pm on May 10, 2011 (gmt 0)
Not a fixed in stone -50 but certainly a random demotion. I read somewhere they were doing random demotions rather than fixed -50 or -100s to keep us guessing more and that is what I am seeing.
My experinces are similiar to Arikgub's above, when I point a few links to the sites all hell breaks loose.
I do not think it is link velocity, rather too many keyword links pointing to the homepage.
It does not look natural for a new site to get lots of keyworded links immediately.
I am wondering about just linking with 'click here' type links initially - of course there is much less point doing this type of linking as the ROI would be reduced.