I'm in the same lucky boat as the OP, however, people that complain seem to be living through a different GW then us.
I'm level 70, several lvl 7 toons (that I don't even use in GW except for 7* JC, Sid and Lumi... excluding the last battle where I bust out my Arena team)
I don't face many hard teams, maybe 1-2 with 5 x 7* toons
I rank in top 15 everyday in Arena, so I'm convinced that theory is not true.
I do have a ton of unleveled toons tho, I think that may be why, I dunno, it would be the only logical explanation as to why I don't face maxed out squads early on.
Maybe they calculated the average strenght of all our toons? I dunno.
