Apparently there is a bus service, I quote from the HIAL website Dundee Airport page:
"New bus service 8X to and from the airport operates 6 days a week - Monday to Saturday from 06.30 hours until 22.30 hours, every 30 minutes. Journey time between the city centre/railiway station and aiport is approximately 5 minutes."
Regarding the KLM survey, no direct service has been started. Hopefully providing there was enough interest something would be put in place but only if the overall economic situation improves & that seems very unlikely at least in the short / medium term.