Bluetooth audio profiles provide different audio latency features and the typical latency figures are:

Hands-Free and Headset Profiles (CVSD codec):

Around 30 ms
 

Hands-Free v.1.6 (mSBC codec)

Around 30-40 ms

Advanced Audio Distribution Profile (A2DP, SBC codec)

Around 100-150 ms

Advanced Audio Distribution Profile (A2DP, aptX codec)

Around 100-150 ms

Advanced Audio Distribution Profile (A2DP, aptX low latency codec)

Around 40 ms

Note: aptX low latency is not currently supported by Bluegiga products due to limited amount of aptX low latency capable source devices on the market.