When you rep sets/air ppl often put you on air and don't hero fold when you rep so few combo's.
When the board is highly co-ordinated and you can rep all sets, a number of 2 pair combo's, str8's and flushes people are more likely to give you the benefit of the doubt.
yea ok - i think my comments need to be taken with the "they are either inclined or not to fold AA" as well
but yeah i get your point