Its insane how much I have sized down in the past two years. I wear a size 13 shoe on average and i'm wearing a 28.5 Full Tilt boot which on their sizing chart is a mens 10.5...not syaing that you need to size down this drastically, but I have found that the wideness of my foot is what has given me the larger shoe size and a smaller ski boot with a wide last has given me that "one with the ski" feeling that was mentioned ABOVE^^
so yes...just let the boot fiitter work his or her magic and good luck finding the perfect boot.....
BUT PLEASE make sure you trust your bootfitter....your season depends on it