runtime timings psql vs pgadmin

When comparing runtimes (via the last line of EXPLAIN ANALYZE output) of a particular query, I
notice that pgadmin consistently reports a smaller value than psql does.

The 8.4.4 db server is Centos 5.2.

The (windows) pgadmin session is connected via an ssh tunnel to the db server.
The psql session is a screen'ed ssh xterm session on the db server (via cygwin).

psql reports:  Total runtime: 13.451 ms

pgadmin reports:  Total runtime: 5.375 ms

This difference is consistent and repeatable.

Is this difference expected?   Could someone explain it?


Thank you,


Erik Rijkers