I think the general quality of the screen is far more important than glossy or matte. It's like asking if a 2 liter engine is better than a 4 liter one. In what chassis? At what weight?

The latest Apple displays I'm using that are glossy easily trump my 30" Cinema Display in terms of being pleasant to read. They might be better in matte but the underlying display quality and technology has proven to be far more important than the coating.