socket slowdown using libpg and 7.1.1 ?

Are there any problems with 7.1.1 when using libpg and TCP/IP socket
connections?
I have three machines, two with 7.1.1 and the other with 7.0.3.

The 7.1.1 machines are 40 times slower than the 7.0.3 machine at returning
the result sets.

I haven't included a query example/data as it is happening on all select
queries.
Running native psql is fine and returns the results in a comparative time,
which points at the TCP socket side of things? All machines are on the same
100Meg LAN, so networking is okay

Do you need more details?
If so, what logs etc. are helpful?

Thanks,
Chris