Does sweating mean you're more fit?

Here's a blog post by Chris Carmichael .. He helped that cyclist Lance ..

http://www.trainrightblog.com/

In short, as you train more and become more fit, your body adapts. You'll start to sweat earlier in a session and you'll sweat more.

I thought that as you sweat more you'd need more electrolytes. But Carmichael says no: as you become more fit, your body becomes more efficient and you lose electrolytes at a slower rate (But you'll still lose them so whatever you're doing nutrition wise will have to take that into account).