OK, I know already how this is going to go and what views about this are on Mumsnet, but my question I guess is why people are so against cry it out methods? Recent research showed no differences in babies' behaviour/happiness/attachment etc. between cry it out and other sleep training methods. I'm always surprised by how strongly people are against it, especially as anyone born in the 80s or before probably were trained that way.
Enlighten me! Is using cry it out unreasonable? Why/why not?