[development] is drupal a MVC stuff

I was updating the wikipedia's drupal page with pressflow distribution yesterday, there i observed that drupal is build using MVC design pattern [1]. But i remember my mentor telling me that drupal is NOT based on MVC. Is it changed in the recent version or the person who updated the wiki page has misunderstood the concept. Please enlighten me. Snapshot of the wiki page http://img101.imageshack.us/img101/4592/drupalmvc.png [1] http://en.wikipedia.org/wiki/Drupal#MVC_Framework -- Thanks Sivaji