These speedtests are interesting, but they don't really mean much as far as your general browsing performance is concerned. Once you get basic broadband speeds, the speed you'll get surfing sites like this forum will be more down to the browser you're using (especially with javascript - rich sites like ours), and the speed of the database behind the site resolving your page requests and building the pages for you. Other people (like kids and family) using your connection can also seriously degrade browsing performance - if they're downloading video or audio for example. Often the thing that chokes on a home network is the upload bandwidth - you always need a few kB free to allow 'handshakes' and packet receipts to be passed back to the site you're connected to, or it'll end up slow even if you've loads of download capacity free...
Its good that one the whole people's experiences since the upgrade have been positive - at least so far