7x5.5 is somewhat arbitrary, and it has different meanings for different guys, even though you standardize the starting point as 6x5. If the choice involved 7.5x5.5, I might perhaps be inclined to take that option. 7.75x5.75, and I would say probably. 8x6 for sure.
Everyone has a different place where they draw that line, depending on their individual goals. I also imagine the hard gainers would be more likely to take a smaller deal.