DD has anaphylactic allergies, but not to nuts. I think we gave her pb before a year and it was all good. I am delaying pb and some other allergens until after age 1 on the advice of his ped on account of DD's allergies.
For the record, we had no family history of allergies. Not to freak anyone out, but you need to be aware that it can happen anyway. FWIW, knowing of the new research, I wouldn't delay foods with a child with no family history. It's not worth excessive worry, just vigilance.