Unsure of the exact mpg,i never have taken much notice on any of my bikes,but i have found the mpg far better on the 2013-on compared to the olders Burgmans.I am currently running-in my present Burgman,so riding it in a fairly sensible manner

from a full tank i am on 175 miles with 2 bars still showing,been keeping it well under 4k rpm and vary the speeds,with 60 mph being the max "A"roads 50-55 mph and other roads around 40mph except where there is a 30mph speed limit
May of helped you,but for pottering around...yes it is far better,for touring i guess it will depend on amount of luggage you take,will you be two-up ect,clearly if you're cranking it up on motorways,no bike is going to give good mpg,but minor A roads and country lanes its gonna be good.What better mpg you may gain on other bikes,you are going to loose the comfort factor given from the Burgman.
Regards
Steve