I wish judges would weigh them. There are some AMs that ive seen that are the size of heavy American breeds. Every time I see a huge AM, I know its going to be best of breed even before the show starts. Sure enough Im always right. I wonder if its a western trend.
I know some fanciers are crossbreeding Australorps (and other breeds) with their black Ameracuanas. These people are out of their league when it comes to breeding and even though some licensed judges place these crossed birds high at shows it must be the judges don't have enough experience around the real thing. Weight wise the birds could still be within limits, but I've seen how extra fluffy they are and lack Ameraucana type. It is true I used Australorps decades ago to create LF black Ameraucanas, but there has been no reason to crossbreed them for many years with quality Ameraucanas out there to out cross (not the same as crossbreeding) with for improvement. It took a long time to lose the brown egg genes from the original Australorp crosses and these folks are going backwards. Good bay eye color will also be diminished.
I also have reasons to believe some have recently crossbred buff Orpingtons to LF buff Ameraucanas. Here again it is true that I used Orpingtons decades ago to create LF buff Ameraucanas, but to crossbreed them today is a step in the wrong direction. The Orpingtons are way too fluffy, lay brown eggs and mask slate shanks. It took many years to try to overcome those traits and some are still problems today. I've seen recent photos of LF buffs that lack Ameraucana type and appear more Orpington than they should and I've heard from a friend that he disposed of the LF buff Ameraucana flock he recently obtained because they started laying brown eggs!
Buying "standard" Ameraucanas may not always be the same as "show quality", when you have some inexperienced judges that pick what tickles their fancy and fanciers that are more interested in breeding and exhibiting birds judges will pick than what the standard dictates.