"I wouldn't have made the comment if that wasn't my experience."
I appreciate that, but I was giving you my experience. The site runs fast on all my machines, and - so far - I have no reports of slow running from anyone else.
We're getting error messages, but that's down to teething problems, and will be resolved as soon as possible.
The login situation is also something we'll address very soon. Large numbers of people like being logged in automatically, but I appreciate that others - including you -don't. You're not "permanently logged in" of course, Your browser does it automatically each time you come to the site