Reason why Oracle is slow

during exploring new features in Oracle 10G Release 2 i found by accident
the proof why oracle is so slow (in spite of this is not a new feature)

SQL> select parameter_name, parameter_value, description 
from dba_advisor_def_parameters 
where advisor_name = 'ADDM' and parameter_name like 'DBIO%';

PARAMETER_NAME          PARAMETER_VALUE
----------------------  -----------------
DESCRIPTION
----------------------------------------
DBIO_EXPECTED           10000
Die erwartete Antwortzeit in Millisekunden 
f³r das Lesen eines Datenblocks aus einer Datendatei

(this is translated: the expected average response
in milliseconds for reading a datablock from a database file)

.)