I have a really hard time finding people who are willing to give me the whipping/flogging kind of feedback I crave. I find beta'ing to a type of collaboration and have really enjoyed it when people have cared enough to do it for me, but I know that none of us have as much time as we'd like and there seems to be a trend for people not to want that deep criticism.
Re: Grammar, Critique, Betas
Er, long way of saying, yes! I totally agree!