Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
At 3,4,5 and 7 pm EST I get the too slow for streaming message while a testspeed.net show speeds of > 930 Mps for D/L and 821 Mbps for U/P. What happening?
Anyone experiencing this?

If you have a VPN, try turning it on and see if that helps.
For reasons I've never figured out, my MSFS installation will download updates about twice as fast if it's connected to a VPN (I use ExpressVPN), so maybe you're running into something similar.