The latest Nielsen survey shows that 104.7 has 20.2 per cent of the Canberra market across all demographics, followed by the ABC on 18.5 per cent.

Mix 106.3 is third with 16.9 per cent.

In 2009, the two commercial FM stations were neck and neck in the ratings, with 104.7 barely ahead on 18.3 per cent of the market, and the ABC coming third.

Canberra FM owns both Mix 106.3 and 104.7.

The ABC's Ross Solly continued to win the breakfast ratings battle for the third year in a row, holding steady with 21.1 per cent of the market.

His closest rivals are 104.7's ''Scotty and Nige'' show hosted by Scott Masters and Nigel Johnson which has 20 per cent of the market, up from 18.8 per cent in the last survey.

In the afternoons, 104.7 leads the drive-time shift from 4-7pm with comedy duo Hamish and Andy's syndicated radio show.

The ABC's ailing youth station, Triple J, was one of the biggest losers, dropping a massive 25 percentage points in its key demographic of 18-24 year olds.

Triple J, which was dominating the younger demographic with 40 per cent of the market last survey, has now relinquished the lead to 104.7 (47.3 per cent of the market) and slumped to just 15 per cent.

The majority of Canberra's younger radio listeners now tune into the commercial FM stations with 104.7 leading the ratings among people aged 10 to 39.

The station has 48.4 per cent of the teenage market, 47.3 per cent of the 18-24-year-olds and 29.4 of 25-39-year-olds.

The ABC is still most popular with seniors, owning 32.6 per cent of the market among Canberrans aged 55 or older.

For more on this story, see the print edition of today's Canberra Times.