Yes I can confirm that WSOC-FM has been Country much longer than WKKT. I think WSOC-FM has been Country since at least the mid-1970's and WKKT was A/C as WLVV when I got to Charlotte in 1981. They went country as WLVK in 1985.
WSOC-FM had a solid line up of jocks for years including the late Bill Dollar, Bill Ellis (who left for WSSL Greenville, SC and he's still there!), Edd Robinson (music director who knew everyone in country music, Edd went to WFMX), and Bob Brandon. All very talented guys!
I remember a young guy named Paul Shadt who worked part-time and was buzzing around WSOC-FM all the time. What ever happened to him?