You get what you pay for except for BB. Data rates are invariably spec'd as "up to x Megs". Being tight fisted I only pay for "up to 8 Megs" and for most of the day we see about 6 Megs. On weekdays this drops to about 2 or 3 when the youngsters get out of school but usually recovers during the evening. When we first had it it was not throttled back and the line was able to sustain 19 Megs.
The drop off doesn't usually cause us any problems despite us both sharing the single connection for our work activities and running several PCs concurrently.
The regulator is about to step in and compel the ISPs to tell customers what rate they should expect to see. I will believe that when I see it.
Rans6...