Yes, it's the rack:
http://www.buy-steering.com/troubleshoot.htm
http://www.forparts.com/ICpowersteeringleakt5.05.htm
Of Course it's the rack, and I am still not ready to replace it,, the labor is just too much for my screwed up body... But, if it does get worse, I mjght might have to have somone else do it..
It I had a hydraulic lift I would consider R&R.
look in the atricles I posted: under no power sterring when cold.... you can't even rebuild them because replacing seals does not repair a failing rack.. besides, you can find rebuilts for $150.00. It is the labor that kills the deal.