PS: why a Google form and not something better? See https://bugzilla.wikimedia.org/show_bug.cgi?id=51050 :)
That page does not mention anything of the sort.
True, strictly speaking. Let me explain:
Ideally this information would be defined by Wikimedia contributors through their user profiles at http://wikitech.wikimedia.org
Since we don't have such feature implemented, we are using a Google form to get the data with certain privacy and order (at least compared to a public wiki page). Then that data needs to be introduced manually in the database powering http://korma.wmflabs.org/
Additionally, not everyone who uses the Mailing list and associated items that are asked about on the Google Form has a Wikitech account.
I, for instance, don't have a Wikitech account, but do contribute to the Mailing list whenever I feel I can (and I read everything).
Thank you, Derric Atzrott