Do magnetic lens-swap goggles actually swap faster?

Yes, according to almost every source we read. Magnetic systems (popularized by Anon and now used on OutdoorMaster PRO, EXP VISION's magnetic model, and others) are described as 'the easiest lens change I've ever experienced' in r/skiing threads. The trade-off mentioned by some commenters is that strong magnets can theoretically pop loose in a hard crash, though we didn't see widespread reports of this happening.