DNS server performance

[Henning Schulzrinne]

What kind of query rates can a good DNS server sustain these days? Any
order-of-magnitude design values or something specific such as "a Sega
Dreamcast running SegaOS and bind 8.7 can sustain a rate of 100
'standard' queries a second" would be very helpful.
-- 
Henning Schulzrinne   http://www.cs.columbia.edu/~hgs