haha awesome lordchaos, you know I was just giving you sht, but much respect on pushing that much weight.
Haha I know.
As for the recovery time. It is possible for muscles to be fatigued and need to recover for that long. As far as DOMS I've never heard of it lasting 3 weeks. A change in the duration of DOMS could be due to your recent change in training routines. The program that you posted, when done correctly, is at a much higher intensity than the bodyweight workout you were doing (which was most likely moderate intensity). The deeper strength inroading process caused by higher intensity workouts would certainly increase the duration of recovery for the muscle but that is in terms of fatiguability not DOMS.
In my experience, when I first began working out my muscles would take a long time being sore and gradually they recovered faster as my fitness improved. They again went through the same process when I adapted to a higher intensity workout like you switched to.