Knowing whether someone's rating is tentative or not is useful for recognizing whether someone is actually at that skill level or not. Even better would be to have the rating deviation; I don't know if this is available directly per-game, however, or if it would be somehow related to the account (and thus inaccessible because it updates immediately after a game is played).
I believe this information is available in the JSON endpoint.
Knowing whether someone's rating is tentative or not is useful for recognizing whether someone is actually at that skill level or not. Even better would be to have the rating deviation; I don't know if this is available directly per-game, however, or if it would be somehow related to the account (and thus inaccessible because it updates immediately after a game is played).
I believe this information is available in the JSON endpoint.