EDIT: And speak of the devil, Guild's most recent block was orphaned by Discus Fish even though BTC Guild's block was seen by most of the network well before theirs, since they found the following block. Guild's block was seen *14 seconds* before Discus Fish's block by blockchain.info, and 96% of the nodes blockchain.info is connected to reported Guild's block over Discus Fish's.
Selfish mining is alive and well, then. Any indication that DF might have been perfectly well aware that Guild had already reported 298926 before building on their own preceding block (298925)?