I've posed that question a few times over the years on theChipBoard.
In fact, I believe you joined the conversation one time.

Here are the links to the threads.

http://www.thechipboard.com/archives/archives.pl/bid/324/md/read/id/1380887/sbj/bucket-of-blood-chip-question/
http://www.thechipboard.com/archives/archives.pl/bid/325/md/read/id/1437844/sbj/bucket-of-blood-chip-question/
http://www.thechipboard.com/archives/archives.pl/bid/325/page/1/md/read/id/1550853/sbj/bucket-of-blood-chip-question/