Since Friday-ish last week (4 January) sync between my FTM tree and Ancestry has been freakishly slow. I haven't changed anything on my side, save my tree has grown a bit (from just under 8000 individuals to just over 8000). Nonetheless, a simple 5 record change online can take up to 30 minutes (or more) to sync since about Friday.
Has anyone else noticed this? Nothing else has been altered on my end, and it makes no difference whether I am syncing from FTM-->Ancestry, vice-versa, or bidirectionally.