I did a buy on the S4's and their hashrate locally is 2th/s or greater (awesome!) however, when connected to BTCGuild NONE of them show anywhere close to 2 Th/s.  They show more like 200 Gh/s.  I have 2 that are over 1 Th/s, but the rest between 0 - 278 GH/s.  WTF Bitmain?