A Content Distribution Network is a service that copies much of a website onto multiple servers that are located in several countries across the globe. The benefit is that the service automatically detects where a visitor is located and serves the web pages from the server that is closest to the visitor.

The service also caches static things like images on their servers.

In theory, that makes CSH appear faster to many visitors. The initial stats provided by CloudFlare say that the blog page load speed may have increased by up to 60% from 3.63 seconds on average to 1.37 secs.

I don't know whether or not the forum will speed up because it is too dynamic to be worthy of caching, unlike the static blog pages that only change when somebody adds a comment. But I guess the forum images, gravatars and icons will be cached.

Anyway, please report any wobbles that you may notice. CSH has only just now been activated so it may take 24 hours before any impact may be felt at your end.