Can you tell a little bit about your SAC? How long did you last with a 10L/11L tank when you started diving? And did you (guys) see your diving time extend over time with the same amount of gas? Is 25 dives enough to have reached your maximum or is this something that improves after 50-100dives? Some friends of mine dives around 90m with a 12L tank. (start 200bar, end 50bar)
To be honest, I wouldn't know how much I use even now. I use ~15l/min as base, I typically do it "on the fly" as most of my dives are pretty straightforward dives with sometimes (very) heavy work, so I'll just watch the spg every 5 minutes and go from there (I'm pretty good at approximate maths
).
I didn't see a huge difference between dry and wet personally. But maybe there is.
When I started, I used to do around 50-60 minutes on an s80 as well, but they were shallow, sometimes the tank was overfilled. Sometimes you blow your tank in 30 minutes and feel dumb, then next dive it's your buddy which does that.
SAC will depend on how comfortable you are, but on so many other things aside from techniques (trim, propulsion), your state (mental and physical), the dive conditions (vis, temperature, current). So it might be your "end point" after 10 dives if you've been taught properly, it might get there after your 300th dive if you've been in a serious case of bad instruction and inbreeding before you get to see someone that actually dives and not just jumps in the water.
TL,DR; I don't know much about it, and I don't think people should care too much about it unless it really seems off (ie you reach turn pressure where the others still have full tanks)