[snip]
Basically it comes down like this:
Last month we served 6,166,994,300 banner requests (served to every page in a content namespace -- so not Special pages but pretty much everything else.)
- of which 28,739,500 were IPv6 (0.47%)
- of which 39,800 failed to resolve to a country, even with IPv4 fallback (0.0006%)
-- (in the noise floor we had 300 people resolve to anonymous proxy or 'European Union' IPs; there were no satellite provider or 'Asia Pacific' resolutions recorded)
I had Ottomata do a filter on
geoiplookup.wikimedia.org (our IPv4 only fallback host). In the period between 22:58 and 23:17 we served 344 requests. In that time period we had roughly 210,000 IPv6 requests. Meaning that our fallback is important for ~0.16% of IPv6 users.
I still think we should, in fundraising, do an interstitial page because that's a friendly thing to do. But for sitewide operations; I think the success rate is fairly good. Most of the 'crummyness' that Josh routinely reports is fuzzyness around borders -- e.g. people in India resolving to being in Pakistan.
[snip]