isFriend should be isRIDFriend. That might clear things up a little.
The last boolean is canSoR.
Code:
local presenceID, presenceName, battleTag, isBattleTagPresence, toonName, toonID, client, isOnline, lastOnline, isAFK, isDND, messageText, noteText, isRIDFriend, messageTime, canSoR = BNGetFriendInfo(id)