Dwight isn't as good as Shaq in his prime no.. but Dwight never had a Kobe, DWade, or LeBron to back him up. In my opinion Dwight hasn't capped his potential yet, he is still learning and could very well become one of the greats.
I would love to see a team with Dwight and and a MVP caliber player on it. I think Dwight and LeBron on the same team would be like 70% more effective than Shaq is..