Does anyone have any swim times for comparison? If you can do 30s per 25 yards with a kick off the wall, what kind of time would you expect in an 800m open water (lake) triathlon?

800m = 875 yards = 35 pool lengths. So at 30s per 25yd... that's 30s*35 = 1050s or 17:30.

I would guess the kick off the wall gives me about 2s per pool length so I guess I would add 70s which would make it 18:40. But then, I don't know how much advantage a wet suit and drafting would get me. I also don't know exactly how the start and end points are situated (do you wade through the water a bit at the start and ends..?)