I don't quite agree with "typically". The numbers of filibusters (and cloture votes) has radically increased in recent history, but I'm not sure if you can really call it the default behavior yet.

https://en.wikipedia.org/wiki/Filibuster_in_the_United_State...

https://www.senate.gov/pagelayout/reference/cloture_motions/...

Also, it's not even applied to 50% of resolutions:

https://www.govtrack.us/congress/bills/statistics