Re: Bugger maximum speeds
Having dealt with procurement for a number of different connection types, having a minimum (or committed) speed would make sense. I bet few people understood what contention ratio meant back when ADSL came along - how many actually realised that "512kbps @ 50:1 contention ratio" actually meant they could get less than dial-up speeds and the ISP was still meeting it's promise.
The problem comes when you try and define what the minimum rate actually is. At work, we had a customer that got the full ADSL line rate (literally a stones throw from the exchange) but actual throughput was crap thanks to the ISP having underinvested in backhaul.