Prof. Larry Ribstein has a post about a symposium he participated in at Suffolk Law School in connection with the 20th Anniversary  of the LLC (according to one way to measure it). Here is an enlightening part of the post:

First, for those of you who are unconvinced, LLCs are, in fact, a big deal. For example,  [Prof.] Ann Conaway reported on the recent data on Delaware LLCs: 490,000 in all, producing about the same percentage of Delaware’s gross revenues as its booming business in big corporations.