No, Google is optimizing based on CHANGE which could either be creation or update.
Don't confuse what's indexed and ranked in Google's pages by how frequently it's crawled.
If you have a page of merit that never changes, which is already indexed and ranked, why does it need to be crawled frequently?
Slightly off the Google topic, but many people are complaining on WebmasterWorld that Yahoo Slurp! is indexing way too fast at the moment. Not everyone is thrilled when a single crawler burns 1GB or more of bandwidth a month or crawls too fast during peak hours and slows down visitor response times.
[edited by: incrediBILL at 5:14 pm (utc) on May 4, 2008]