In short the opinion polls haven't benefited from a new Lib Dem leader, but equally no major mistakes except his attack on David Cameron's support for marriage and admitting he's an atheist. ( The Lib Dems picked up a big Muslim vote at the last general election - there is no way many Muslims will vote for an atheist. Equally the Lib Dems used to get a large Christian backing - they will also be thinking twice.)
As with my opinion people are interested by the idea of a more economically liberal and smaller state party might have on British politics. Conservative home shares my concerns made else where that Nick Clegg can't really take his party with him. But there are Tory's willing him on.