Pages are loading more slowly, you can notice lagging of some actions. As a developer I am used to going fast through things, so when things are slow, it is noticable. Maybe it is due to pluggins, I don't know, I just know it is surprisingly slower.

Under every other circumstance, I would prefer linux/ubuntu to any other machine. I was using linux for several years as primary dev machine. At the moment I am on a mac, even though I have both linux and win machines as well.