McCrory lost Mecklenburg County by about 400 votes. Perdue had considerable help from Obama coattails in the county, as O won the county by about 100K, and so did Kay Hagan, who took Elizabeth Dole’s Senate seat. A good part of this was due to straight-ticket voting. About 118,000 Dems voted this way in the county, to about 44,000 Repubs. Also, the Dem majority on the County Commission was increased as all 3 at-large candidates were swept into office. So, yes, Charlotte is trending blue. Much of the red has moved out to the suburbs in NC and SC, to get away from high taxes and bad schools.
Don't forget the out of control crime threatening to turn Charlotte into a Southern version of Detroit.