Just got matched against the same guy twice. I can totally get why people get frustrated with this game now - it was a board wipe deck centred around slowly hitting towers until 10 mana is reached, and then Bolt of Damocles to kill 2 towers. Every other round had at least one lane wiped of everything. So bloody boring. :/
So....monoblue.
Could have possibly not been the same person, that's just sort of the meta right now.
Though it also could have been the same person. Happens more in Keepers Draft, and happens occasionally in other playlists as well.