... I don't think so.
We have a site that is a PR6. It's ranking on page 1 for highly competitive terms. However, for a specific keyword, the ranking URL has over 500 facebook likes, 50 tweets, and 30 Google +1s.
The competition above us, doesn't come close.
1) We have higher PR
2) We have more facebook likes
3) We have more tweets
4) we have more +1s
... yet we're being outranked by sites that shouldn't even be in the top 10.
Anyone seeing their social signals helping their ranking?