[vavrusa]

This is a great comment. The ping time is so much less meaningful for recursive service than for authoritative. The latency difference between cached answer and uncached answer is in several orders of magnitude. The cache hit ratio also plummets without some sort of cache sharing, which many recursive services don't implement. So you may end up with great ping time, but something like:

``` ;; Query time: 12 msec ;; Query time: 149 msec ;; Query time: 14 msec ;; Query time: 238 msec ;; Query time: 112 msec ;; Query time: 27 msec ```

For less popular names.