I am not sure on this, but I found all my unaffected sites have the following
1. high deep linking vs homepage link ratio. Number of backlinks on inner links are higher than number of banklinks on homepage.
2. not much seo promotion lately , just social bookmarking.
How about you guys?
about deep linking....
25 client's sites still ranking the same with absolutely no deep linking on them
(but...11 of those sites have over 600 pages of unique content and dmoz links, the client's target site is deep linked to hell and back by those sites, and it still ranks even higher, i doubt deep linking is a factor based on this info)
the other 20 sites are still ranking the same (if not moved up) and have deep linking, and have direct sb blasts
so that isn't a factor (hell, 8 of them are akismet blacklisted and still ranking so that's got nothing to do with it either)
of those 20 that have deep linking, 10 are campaigns that have been running all month this month and last month
the other 10 are about 2-6 months old with no links made between then and now
(i did shuffle my blogroll links network wide though as the update was rolling out)
i had nothing drop in ranking
what i never did was...
i never utilized public blog networks
i never used xrumer or forum posts or profiles
i never used unreadable posts
none of these sites run ads