I just filled up my 05 for the first time. Filled up with trip mileage at 211.6 miles w/ 4.1 gallons, that put it at 51.61 mpg. The twisty to highway percentages were probably around 40% to 60% respectively. Still breaking in the engine but I'm not a huge high rev-er in general so I expect to get around 50 mpg on average. Thank goodness because gas is too expensive and I was reading a lot of people saying they were getting in the low 40's!
To compare, on my old 99 R6 (carb'ed) I used to get about the same gas mileage: 50 to 55. Almost never below 50; in fact, I can't remember it ever being below 50...