How to achieve 2Mbps data rate?

[qoolink]

Int the website:

link text

FEATURES show the nordice nRF51822 has 3 data rates (2Mbps/1Mbps/250kbps).

But , I set

number of packets transmitted per connection event 20

Connection interval 7.5

I can't achieve 2Mbps throughput ?

[Dave_couling]

BLE is its own protocol. Proprietary or other protocol's like ANT are different