I've managed nearly 3000 miles now in my 180 auto prestige.
Economy hasn't moved much since delivery to be honest. Averaging between 51 and 53mpg per tank when sensible, and my driving includes a mix of dual carriageway, country and town driving.
I haven't seen a great deal of difference between Eco and normal, maybe 1 or 2 mpg, but it definitely drives better in normal.
As for dynamic, it certainly is the most fun, but recently got down to 35mpg after a recent quick cross country drive, and I'm sure that could go even lower!
The mpg is as expected and similar to the merc I tested, although the tank on the jag seems quite small (smaller than my golf which seems very strange), so it makes it feel like the mpg is worse as I'm filling up more often!