So, after roughly a year of negotiations, the deal between Norton Rose Fulbright and New York-based Chadbourne & Parke is finally complete.

Thanks to its latest combination, serial acquirer Norton Rose now has around 4,000 attorneys, a quarter of which are in the United States, as well as a network of 58 offices in 32 countries, and annual revenues of about $2 billion. Big Law indeed.

If large-scale law firm mergers are widely accepted to be extraordinarily difficult things to pull off, somebody clearly hasn't told Norton Rose. By my count—and I've almost certainly missed some—this is the firm's eighth full-blown merger or acquisition in the past seven years. The legacy Norton Rose's revenue has increased by approximately 400 percent over that time, while its lawyer head count has quadrupled. Growth doesn't necessarily mean anything in and of itself, of course, but that's still pretty remarkable.