DCMI V1.5 default of non-random backoff delay during DHCP discovery

In the DCMI V1.5 specification, the non-random back-off delay is specified as the default for DHCP discovery.  Why was non-random selected as the default instead of random?  Random back-off delays on message retries seems like the better option for a DHCP server with many DHCP client as it would provide separation in the retry requests coming from the clients after a time-out.

http://www.intel.com/content/dam/www/public/us/en/documents/technical-specifications/dcmi-v1-5-rev-spec.pdf