This guy only looks a bit hunched because the frame is a size too small. Typical for Surlys for sure. LOL.
Angled up stem and tailbone way to the back end.
I had ZERO back aches on 2 tours with swept steel bars. In Vietnam I was going northbound into a 10 mph wind half the way. I had the bar an inch low and it was miserable. Drops do NOT help much at all into a big wind IMO. I was going 3.5 mph for 25 miles one day into a 32 mph wind. Made zero difference putting my chin way down.