Bind can do simple round-robin load balancing on it's own, but will not check the response time of the server. To do that you will have to choose some kind of performance measurement (for example latency) and then either rewrite the zone file or use the
rrset-order command to tell it which order to deliver the records in.
Either way DNS loadbalancing is far from a perfect solution, especially for high TTL's. What will typically happen is that the DNS server of a large ISP caches your reply, and then the majority of the clients from that ISP hits the first IP in that reply. To avoid this you can set TTL 0 to disable caching, but then your DNS server will get hammered...
For more information about DNS load balancing with bind have a look at http://www.zytrax.com/books/dns/ch9/rr.html (it's not fully up to date, being written for 9.3.0, bind is at 9.7.0 now, but should give you an idea of how you can do it using bind)