EVERY SINGLE EVENING in prime time (8pm -ish to midnight) our 75/75 service slows to 2/20. That's 2mbs download! This is one piece of evidence that shows its a service throttling that the upload would be so much higher. I measure it off a wired connection directly to the main Fios router. I run pings continuously and when the service is normal, pinging Verizon.com, CNN, weather.com etc... is typically in the 10's of ms. During the intentional Verizon throttling of our services, it goes to several hundred ms ping times, peaking over a 1.5 SECONDS at times, and even timing out! It's like developing country internet service.
Worse, they do not communicate the fact they are intentionally ripping their customers to their support center, so the oblivious call center people treat it as a problem on your end and make you do all kinds of stuff for an hour just to then throw up their arms and say they can't explain it and need to ship you a new router (last support call!).
So there is literally no recourse here. Verizon is going to charge for certain speeds and then intentionally not deliver them and during the time most of us use it (they are delivering 2.5% of their contracted speed). And we cannot use customer service to get the service level WE PAID FOR because they intentionally keep them in the dark about it.
I've thought about buying a higher speed but it does not sound like the speed means anything! When you need to use it, Verizon may have decided that you are not going to get the speed you paid for at that time.