Late reply, but business training and MBA are 2 separate things.

Elon has categorically stated that MBAs are a bad idea : http://www.aps.org/publications/apsnews/201311/profiles.cfm

Wharton is an elite school for Business. Very few schools match their education in business. Had Elon went to a random state school that isn't a top 5 business school, he might not be saying that.