M6's performance is pretty good. 

Per third party monitoring websites I have been having a yearly uptime average of about 99.89%.  Which for my sites isn't anything to be concerned about.

I have had a few issues with overloaded application pools, however within 12 hours they had me moved to a different app pool and performance was back on par with what is to be expected. 

Boy, as luck would have it, my ihostasp.net site is down. Let's see how they do:

T=0 notified that site is down via ticket.
T=70 minutes. Site up but broken. No menus visible. Log in as superuser and only see one menu: host. No pages, only home page shows. Sent follow up ticket explaining that.
T=120 minutes Site appears to be back up and functional. I will do further testing.
T=150 minutes. Uploaded skins and modules are not showing in host or admin skin tab. They are available as options in the list when I go to a page or module to apply them.

I'll keep posting results as edits here.