This (slow rc.d) has just been fixed and pulled up to the netbsd-7 branch (but it did not make the 7.0 release). See: http://releng.netbsd.org/cgi-bin/req-7.cgi?show=1015 or: http://gnats.netbsd.org/50046
Excellent! This fix is in the m68030 sets I just posted, so this will be an perfect opportunity to test on a very modest machine.
John