documention wrong or just not clear?

In http://www.postgresql.org/docs/8.2/static/routine-vacuuming.html it says:

"The age column measures the number of transactions from the cutoff XID to the
current transaction's XID. Immediately after a VACUUM, age(relfrozenxid)
should be a little more than the vacuum_freeze_min_age setting that was used
(more by the number of transactions started since the VACUUM started). "

However my results don't seem to bear that out:

postgres=# show vacuum_freeze_min_age;
vacuum_freeze_min_age
-----------------------
100000000
(1 row)
postgres=# VACUUM ;
VACUUM
postgres=# select min (age(relfrozenxid)) from pg_class where relkind = 'r';
min
--------
253045
(1 row)

--
Robert Treat
Build A Brighter LAMP :: Linux Apache {middleware} PostgreSQL