The Titan hashrate was increased again to 400 MH/S
NO. The increasing is for Batch 2 only.
Wrong.
All Titans will be ~400 MHs.
only second batch runs at 400MH/s, that is a different preorder with another price, shipped 1 month later because is an upgrade

cheaper than first batch

No, there is no upgrade, there is nothing MADE right now. Every unit will be
~400 MH/s when they MAKE THEM IN THE FUTURE. If you don't believe me ask KNCMiner.
I hope so man! We both have shares so it's good for everyone if titan reach 400Mh/s , I only know for shure that Knc guarantee a MINIMUM of 300 Mh/s so maybe 400 it's possible and they ship in Q3 so they are near to MADE....do you ask KNC directly for that information?