What can I say, I've worked for years in performance analysis / remediation; there's no such thing as
too fast.
In all fairness to Coffeegeek, it's custom code that was not originally designed with high traffic in mind. Mark has tossed an insane amount of hardware at it to improve performance; there's only so much you can do if the software doesn't scale. In contrast, HB is based on phpBB version 3, which scales to mega-site traffic with ease. Mark plans a complete rewrite of Coffeegeek and promises lots of new features in addition to scalability.
I'll be paying careful attention to the performance of the site over the next few weeks. It seems zippier, that's for certain, but it's also the weekend. Monday/Tuesday is usually the busiest days of the week. My preference is page displays in 0.2 seconds; 0.5 seconds under load. The weighted average "health stats" are shown at the bottom of each page, e.g.:
Overall speed: fast, current page: 0.2s, avg: 0.2s, max: 1.6s
It covers the last hour of activity.