New speed tests conducted during May have shown that many connections are still struggling during peak times.
According to speed-checking service broadband.co.uk, results show that as well as an overall drop in data transfer rates during peak hours, there are significant disparities between individual broadband providers.
"Some suppliers such as BE, O2 and Orange manage to keep average speeds high across all time periods suggesting a good level of network capacity, whereas other see their speeds drop quite significantly," says Edd Dawson, a representative for the group.
Across all UK providers, the average download speed was found to be 3.36 Mbps, which the group suggests is an indication that broadband capacity on the whole is continuing to improve.
Such a figure is an increase of 0.69 Mbps from figures for November 2007, when average download rates stood at 2.67 Mbps.
Earlier this month, an independent study conducted by LCC International found that Vodafone is the fastest mobile broadband provider in the UK.
Use our internet speed test to find out the speed of your connection and compare potentially faster packages.