I agree completely with Offroad and Rnykster--the Outback is a pretty dry ride. I only suffered from the "Wet Butt Syndrome" when I forgot to install the scupper drain plug beneath the seat one time!
Another good idea that I have come around to in the past year or so is to always wear a dry suit. I use the Stearns dry pants--completely waterproof, windproof, and breathable, yet very light weight. Available from Wal-Mart for $19.88. I now also carry a Stearns dry jacket rolled up in a Zip-Loc and stashed in my Hobie seat pocket--also waterproof, wind-proof, breathable, and light weight for $29.89 at Wally World. It is lined only with mesh, but keeps the Spring early morning chill off you in North Florida waters, yet is comfortable enough to wear all day, except probably in the heat of the summer. These Stearns products are really great, but it may be difficult to find them in the right sizes (and colors for the jackets)--I had to hit all three local stores before I found what I was looking for. They also have a separate series of jackets in women's sizes, but the pants are baggy and unisex (see pic below of women's jackets that I got for my wife to choose between).
Other Mirage drive yaks, such as the Adventure, have less freeboard and ride lower in the water, so they tend to be a little wetter in wind and chop. Same for the Sport, but no matter--the wet suit takes care of any such problems, as well as rain (other than gale conditions) anyway.