Thank you kindly for the advice. I do tend to notice changes in speed during certain times of the day/night. For instance, I can fly through cyberspace at 2 a.m. and only get a fraction of that speed at 10 a.m.
I'm on their "preferred" package deal...12mb max, but in the early hours of the morning or when traffic is slower I often see speeds over 30mb. Guess I can't complain for what I get with the middle of the road connection option.