I would even say 15 seconds is too much

Right, 10 seconds might be a better value.

Due to be fixed within the next 3 months. Decided by the scheduling game and http://chatlogs.musicbrainz.org/musicbrainz-devel/2012/2012-07/2012-07-03.html#T19-01-57-842265

This is in review at http://codereview.musicbrainz.org/r/2076/ and available for testing on http://test.musicbrainz.org/

This really isn't working as expected.

Go to http://beta.musicbrainz.org/release/a0d67108-28a1-4084-b7b4-64ff07f2813e/edit
Go to the tracklist tab.
Add an exclamation mark to the end of track 1's name
Go to the recordings tab

Expected outcome: This is only a minor change to the track name, so no recordings need to be confirmed.
Actual outcome: You're expected to reconfirm ALL the recordings (except the two with lengths set).

1. It's asking people to confirm recordings for tracks they haven't even edited. This will certainly drive people batty if it's not fixed.
2. I can't really tell because of the above, but it would seem it's checking the track time even when the track time hasn't been touched. I'm not sure whether that's good or not, but it's not what this ticket says to do.
3. It sees missing times as a big difference in the time. I don't think that should happen. A missing time means we don't know if the times are similar or not, which is not the same thing as knowing the times are definitely not similar. For the former, you normally want to copy the times to the recordings. For the latter, you normally want to select a different recording.

This has been reverted from beta.

Review reopened at http://codereview.musicbrainz.org/r/2076/

A new version of this is in beta testing.