"Still can't find anyone documenting exactly when it went away, although I'm pretty sure it's been gone since at least last summer. However, even though they no longer show the recommendation visibly, tests Eric Enge and I did have shown that in personalized (logged in) results, pages that have been +1'ed by your Google+ friends still get elevated in search (i.e., show at a higher position than they do in non-personalized search)." - Mark Traphagen