Every time I open this book I'm just 


Aside from the endless anecdotes about parents wanting to hit/shake/scream at their baby
...the milestones just seem waaaaay out. I get that the checklists cover quite a range of time, but the quotes with actual weeks under them... You know 'Bob's mom, 18 weeks' etc...
Crawling at 21/22 weeks.
Reeeeaaaalllly?
Waving and following instructions at 31/32 weeks....
I know a LOT of babies and it just seems sooo way out to me. Like months out. Are American babies particularly advanced?! 
Everyone I come accross raves about the app which I don't have but the book I just want to hurl across the room every time I open it!