Guild Wars 2 Forum

Does this skill on elementalist still absorb catapult and treb shots? And if not, when was this changed?

Certified Gameaholic

No, it does not. It was changed in the April 30 2013 update:

Swirling Winds skill: No longer destroys unblockable missiles.

Tiff | [TW] Tempest Wolves | WvW Staff Tempest Guide
NA/EU sPvP Elementalist