MACQUARIE Radio chief executive Angela Clark has questioned the veracity of listeners' diaries that have seen the ABC's rookie announcer Deborah Cameron surge in the ratings in her first year on radio.

Cameron has set new records in the morning slot in the crucial Sydney market, despite critics claiming the former Fairfax journalist's broadcasts have come across as bumbling and amateurish.

In the most recent survey, the ABC 702 reported an audience share of more than 10 per cent, outstripping previous bests by the more polished Virginia Trioli and Sally Loane.

Ms Clark said that Cameron's surge was due to a glitch in the manual diary system used by listeners to chart their radio habits, rather than any real assault by Cameron on the ratings. Read the entire article [link=,25197,24195860-30540,00.html]The Australian [/link]