space taken up by number data types

[Ryan]

I could have swarn I read that Precision with number data types effects how much space is reserved in the database. So number(38) and number(3) reserve different amounts of space.   Here is a link from Tom Kyte in 1998 saying the opposite. Is what he says still true?   http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=355e25d0.17874392%40192.86.155.100&rnum=1&prev=/groups%3Fas_q%3Dnumber%2520datatype%2520storage%26safe%3Dimages%26ie%3DUTF-8%26oe%3DUTF-8%26as_ugroup%3D*oracle*%26lr%3D%26num%3D50%26hl%3Den