A more generous interpretation of their comment is that they are glad that some legal precedence has been set. The same case would not go through courts for another decade.

On the other hand, many companies view GPL software as some sort of kryptonite these days. So a good number of them -- at least the ones that are knowledgeable about software licensing -- won't even go near your software. Personally I'd consider this a good thing; opinions vary, of course.

Certainly there will be some companies that will just see open source code out there and use it, without considering the license at all (not even sure this is most often malice; I expect usually it's just a random developer who doesn't know any better).

But ultimately it's up to the copyright holder if they want to bring some sort of legal action or not. With MIT, you can't stop anyone from doing much of anything, for the most part. With the GPL, you at least give yourself the option, should you decide it's worth pursuing.