I have no problem whatsoever with it. It gives the teachers a starting point, and lets them individualise learning from the get go. Also I would imagine it frees up those first few days so they can spend more time on settling the kindy kids in.
Arranging classes around kids needs and talents has been going on for ages and happens in all years of school. Don't see what is so different about this.
True. Years ago I think it was called "baseline" or something similar, except they would spend the first few weeks of kindergarten doing it.