Em Rusciano's much-hyped take over at 2DayFM from booted hosts Rove McManus and Sam Frost hasn't delivered the immediate boost expected.

The Breakfast show scored a 0.2 per cent increase to claim a 4.0 per cent share in the first ratings survey of the year.

The result keeps 2DayFM well behind the morning competition in Sydney, a position they've been in ever since Kyle & Jackie O announced they were leaving the network in 2013.

Rusciano, who hosts the show with comedian Harley Breen, faced criticism in January after announcing she'd remain in Melbourne to host the Sydney show. Despite early positive reviews, the pair have failed to bring new ears to the slot.