That wouldn't be the case if you had multiple data transfers from different clients though, which is is more realistic... I can't see why you would need a 10 gigabit connection between two servers, but I could be wrong. I can see why you'd go for 10 gigabit with the future in mind, but in all honesty I don't think many networks need that sort of bandwidth, and 10 gigabit switches are just so much more expensive I'd want to be damn sure it's going to make a difference to network performance.