I noticed last night that GMail messages went from instant delivery to the normal BIS delay of up to 15 minutes for the server to be polled.
I would attribute it to the typical BIS delay with IMAP, but it's odd that up until now delivery was instant and now it's not. However, I have only had the device a week and a half.
I've tried deleting and resending the service book. The
account is fine.