Like many others, I experienced the slowness on ACOM yesterday, and put it down to the free period, which ended at midnight last night, US EST.
The slowness has returned this afternoon - even the "internal error has occurred and has been logged" message.
For the better part of an hour, I could not access hints at all. When I was finally able to access hints again, I found all manner of new and strange hints that were totally out of whack - marriage records from a state where the person never lived, from dates before s/he was born, for example.