Mashing together to make one post:

FreeBSD-SA-09:05.telnet and FreeBSD-SA-09:07.libc have been fixed in DragonFly.

These PC-BSD 7.1 vs. Kubuntu 9.04 Benchmarks are interesting but not that conclusive – different versions of gcc were used.  (thanks J. Kanowitz)  Here’s a different comparison of performance inside a VM from Ivan Voras.