The article title caught my eye: "Vaide reasons to cancel Escrow". [acro.net
I've had a few deals fail to close, which were cancelled automatically, but I don't recall cancelling escrow.
I've had a few deals where the buyer's WhoIs record didn't exactly match the deal terms but I've always closed the deal.
So, have you ever backed out of a domain escrow? Why? Were there warning signs? What were they?