Assuming they're being truthful and have knowledge about it, the techs might know what kind of backhaul Frontier has feeding your area. Anyone higher than a tech usually isn't willing to give out specific information. The most you could probably hope to pry out of them is whether it's a fiber or copper backhaul, but that doesn't do much for you.
Knowing if your CO is fed with fiber or copper will tell you if it has more or less than 45mbps per connection. To my knowledge (Net+ and a full time Geek) long distance copper backhaul maxes out at 45mbps T3 lines, and Fiber backhaul almost never feeds at speeds less than 45mbps T3, usually starting at least 150mbps up to several gigabits.
Knowing what kind of backhaul the CO has is only useful if you know how many people are using the internet during peak times. If there are 100 people using the internet when it slows down, and it slows to around 1mbps per person, odds are you have two T3 lines feeding your CO or remote connection point and you should definitely complain POLITELY until your CO is upgraded.
This is all pure speculation though, as even with gigabits of backhaul from your CO to the regional connection point, if there's congestion from that regional connection point out to the internet, you will still experience slow speeds.
If you want to know if the congestion is at your CO or in your region, open a command prompt in windows and ping your internet gateway address (it's the first hop outside your modem) with a "-t" after the address. The "-t" sends pings continuously until you stop it or close the window. It'll look something like this: "ping 74.42.148.105 -t" If your ping times vary a lot or you don't get responses, the congestion is probably between your CO and the regional connection point and one of the ends or the connection in the middle might need to be upgraded. If you DON'T experience changes in ping times or dropped packets, the problem is likely beyond the regional connection point on Frontier's backbone network or on the internet itself. You can also do this in Mac using Network Utility's Ping tab and check the "Send an unlimited number of pings" box.
If you don't experience significant changes in ping times, ping times over 150ms, or many dropped packets over a period of 1-6 hours, the problem is likely beyond the scope of what Frontier is willing to do for you, and you'll simply have to wait for them to upgrade their backbone network in your area, which could be a 6 month wait or more, as they have to lay new fiber or lease bandwidth from other companies like Verizon, AT&T, Level 3, etc.
Please forgive this long post, but I feel it could benefit you