That sounds familiar too... although tends to sum up four for us. Wonder what five will bring?
This is a familiar scenario in our house too but has spanned the 4-6 range.
First year of school is the Jekyll and Hyde year. The child that obeys unquestioningly every rule and is helpful and delightful with their teacher crosses the threshold of their own home at 3.30 every day and immediately turns into a whiny, demanding, back chatting, sobbing brat.
Yes, it started at four. And what's with all the lolling about on furniture, hanging off door handles, etc?
It's funny. We had no problems at the typically considered hard phases - terrible twos and a newborn we coasted along quite happily. We even went back-packing with a two and four year old. This mix of three and five is really quite shocking though. Obviously I love my beans to bits an back but wow, I need my glass of wine at the end of the day!