Personality Type Predictions:
The vast majority are introverts, ballpark 90% introverts.
Most common type: INTJ
NT types > 75% of the population
NF types - a handful or none (possibly more than the next type, possibly less)
ISTJ - a single digit percentage of the LW population
Other guardians and artisans: none or nearly none.
The survey results are in, so I am updating this:
If you scroll down to "MYERS-BRIGGS" you'll see that there are 436 people in Yvain's selection of results (of greater than 10 people for each type, leaving out a total 3.1% of the survey data). That's what these figures are based on. (The raw data is missing around 10% of the responses due to people wanting anonymity, and the graphic provided to show more detail has some issues so I used Yvain's selection.)
Ballpark 90% Introverts: Correct
371 Introverts (85% of 436)
Most common type: INTJ: Cor
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.