Post BECM issue

I went through the BECM nightmare about a month ago and have had my car back now. It seems that I have lost about 10 miles of range since the repair. I am fully aware of the usual range loss due to weather this time of year it is not that. I was wondering if anyone else has seen this? I thought it was possible that the guess-o-meter was also recalculating but its been like a month and its still low.