Seems that National Express have started a new service to Paddington taking their departures to 217 a day for all routes from the airport.
Breakdown of their main routes include:
A1 service to Victoria x 49 departures
A2 service to Paddington x 35 departures
Heathrow x 28 departures
Stansted x 18 departures
Gatwick x 11 departures.
Additionally Green Line also operates 44 departures a day to Victoria.