I can vouch for 2h and polearm type weapons going though objects when 1h would normally get stuck.
Gets me killed at least once a day actually, posted about it like 6 months ago and got met with harsh criticism.
Watch gatehouse battles with 1h and 2h players in there, you will notice the 1h gets stuck on EVERYTHING, the 2h will get stuck occasionally and usually will fire unhindered.