"MxM is unusually slow right now. What is going on?"
We run backups of MxM every night beginning at 11:00PM Central. It typically takes about 3.5 hours and ends around 3:00AM Central, but may run longer. During parts of the backup process, the site may experience lag.
We're always trying to improve site responsiveness. If you have feedback or a complaint, feel free to contact an admin. Refer to Getting Help from an Admin