mike have you tried doing a complete power cycle? by this i mean turning off all things connected to the modem/router (computer(s) , then the router it self, and leaving them off for a few mins? this could also be a problem and can slow you down.
looks like you are on the performance package or fibe 6. any of that sound familiar? im just going by your dl speeds. give them a call, alot of things got screwed up when they went fiber. i give them crap every week cause this is my speed
unfortunately as fast as it is, it crashes on me more than a few times a day, real piss off.
call them, tell them your pissed, get a discount..