Fairly certain of two things:
1. batch 4 will be based off bran new chip design. Be it a BFL or Bitfury derivative or license or in-house developed
2. After the batch delays from Avalon their 'name' is worth a lot less then you would expect. They have to match or beat market price per Gh/s and W/gh to be successful.
um...yufi stated there probably wont be a batch 4... the new chip design will probably just be released in raw chips...not actual built units.
And that would destroy bfl-chip sells totally. Because avalon could deliver the chips very fast while bfl-customers would have to wait 14.28 weeks for the chips to arrive.
A real market advantage for customers and avalon.