For a family, 60 days to pack everythig you own, and move, while supporting everyone is not easy at best, and untenable at worst. When I was single this was not the case.
This doesn't pass the BS test, especially if you are local. I have moved across town; with a family and a day job, in around 15 days, with most of the move taking place the first 7. Out of town, I can see 30 - 45. It would require planning and a UHaul (if within 250 miles) and a semi-truck moving company if further out than that. It literally just takes a bit of planning and follow through.