Believe me the capped products are just as bad at the moment. I am only able to get 2mbps from my 6mbps line in the evening... when I switch to another ISP it goes full speed.
Sounds like some capped users may have the same symptoms we're seeing on Business. It makes sense since Business is essentially an Uncapped Capped and draws from the same resources. While we're seeing high demand on the network in relation to available capacity, this could be the case - but will most likely be resolved when our ordered capacity is delivered soon.