OK, 200+ miles on the DW's, impressions so far:
Smooth rolling, better than the Yokohama's.
Very quiet, little or no tread noise.
Am experiencing some tramlining on grooved pavement, and the car is a little squirrely on the grating of the Park St Bridge (drawbridge) going into/out of Alameda Island.
I've scrubbed off the release agents left on the tire tread (sidewalls still an issue, need a stiffer brush than my current wheel/tire brush) so the bridge issue can't be caused by that, probably the thick bands of treadless rubber in the center of the tire.
other than that, I think I am going to be very happy with these. Will see what happens when we get some rain out here (usually late Oct).

What are your guys mpg looking like after switching to 205's?

Generally, going to a larger tire reduces mileage somewhat because the tire is heavier than stock. But there is more to it than that, the rubber compound used is also a big factor.
The DW, being a "high performance summer tire" has a fairly soft & sticky compound for better traction & handling. This means higher friction (which helps the traction/handling) which reduces the mileage even more- also why there is no mileage warranty on the tire. I find it an acceptable trade off.
When I went to the Yokohama's from the stock Dunlops I saw a 1-2 mpg reduction. Waiting for a couple of more tanks of gas to assess what difference the DW is making. My right foot has suddenly become a little heavier because these tires grip so well.:vtec:

for me, not much of a difference i could tell. the temperature/humidity and winterized gas we get in the colder months have a much bigger effect than the 185 vs 205 tire resistance. :)

I ran the DW on my 2011 Mustang and they did really good in the rain and I pushed them pretty hard.I'm running the Kumho Ecsta 4X in 205/50 on my Fit and my mileage did not drop at all.

My tire pressure seems to affect mpg's more then anything else.I increased to 36psi cold and saw a 1-2mpg increase from 32-33 psi cold

Just got a set of Conti DW's on my GE today. What tire pressures are you guys running?

I run 205/55/16 all around on a 13 fit and have no issues. I’d actually want to run 205/60/16 in the rear but idk if it’ll work . I’m stock height