When I first saw the post that this site was slow, I tried it out myself and I swear it was the quickest I've ever seen pages load here. I wasn't sure how to respond and wanted to research a little more.
Today, though...is awful. Most everything loads up as normal, then my browser freezes for a few moments. I disabled the feeds for a bit, because it always seemed to freeze before they are loaded. But the browser still froze, so I put it back. I tried my test site, and it was behaving the same. I have a feeling it is an issue with our host. I'll poke around a bit more...
As far as mobile access goes, I never really gave it any thought. Looking at our statistics, 2% of our visitors view this site from an iPhone. A few have tried from Blackberry and Android phones, but they are very scarce. If anyone has seen issues with these devices, let me know what they are Maybe I can disable certain features when accessed with a phone.