Hi,
To accurately answer this, it depends on where the 2 mbps limit is applied?
1) If configured on the last mile base station then no. The 2 mbps bottleneck is between the client radio and the base station.
2) If the rate limit is applied at the central site, but the client radio syncs at say 10 mbps, the yes. You can then provide that client with 2 mbps, upto 10 mbps.
A quick check, if two users connected to the same base station share a file, what throughput do they get? If radio speed, then yes, if 2 mbps, then no.
Are inter-client traffic tunneled/routed via a central server?