No and no 
We amended the default prioritize_exact_search_title_match is now default true.
We also bumped up our index version to version 5.
This means that every 2 hours 10,000 topics and 20,000 of the newest posts with an old index version will be reindexed.
You can rush the process by running rake search:reindex but there is no need really, it will happen automatically in the background anyway. (it probably did already for most)