The study, carried out by Social Media Affairs (SMA), found 19 per cent of bloggers identified as Conservative Party supporters, compared with 16 per cent each for the Labour Party and the Liberal Democrats.
But Labour parliamentary candidate Lucy Powell hit back: 'I thought we'd moved on from social media in politics being about how much traffic one blog gets versus another and towards how we actually adapt to a completely new social environment.'
Fishburn Hedges director Simon Redfern blogged: 'What SMA has come up with is a measurement system that takes into account hits on a blog, as well as activity on that site for the first hour after posting. That inevitably means longer-term bloggers such as Guido (Fawkes) score much more activity, because they have got the longevity and the user base.'
And Wolfstar MD Stuart Bruce said: 'It makes no mention of all of Labour's genuine breakthroughs online such as inviting bloggers to press conferences and its virtual phone bank, which enables activists to get out and campaign (without even leaving their armchairs). It also makes no mention of Labourspace.com. And it doesn't mention all the exciting innovations from the Labour grassroots.'
The report, Politics Online 2009, was published last week to coincide with the launch of SMA, the UK's first major directory of political blogs.