Here’s some recent x86_64 bulk builds: one on DragonFly 2.11, one on NetBSd 5.0.2, and one on Linux 2.6.37.4.  Some data of note: DragonFly is within 8%-ish total packages built compared to NetBSD, which could be considered the baseline.  Linux, the more common platform for most of the software built, is another step less.  I don’t know if there’s any dramatic conclusion to get from this other than, “Hey, a lot of packages build on DragonFly!”