BROKER_CONNECTION_RECEIVE_TASK

Occurs when waiting for access to receive a message on a connection endpoint. Receive access to the endpoint is serialized. Information from Microsoft®

Each Service Broker (and Database Mirroring) connection endpoint has a list of buffers posted to receive data from the network. There are two threads working on this list, one that posts buffers for receive and one that processes them after receiving the data.

This wait type is charged whenever these threads attempt to access this list to add or remove buffers.

Waiting_tasks_count and wait_time_ms for this wait type should both be proportional to the amount of network data received by all Service Broker (and Database Mirroring) connection endpoints and avg_wait_time_ms should be a really small value. Source: http://blogs.msdn.com/b/sql_service_broker/archive/2008/12/01/service-broker-wait-types.aspx