Actually from what I've seen so far the A batches are outperforming the B batches, and the most consistent week for a good overclock is week 26. So look for a L726A*** quad and you have a really good chance of getting a pretty nice overclock
Don't agree with that. Looking at your table, volts required etc, and my own 'B' they seem about on par with the L726A's.

RLM