Let's do a test and find out which search engine does best, Google vs. Bing.
Very clearly, Google has indexed a lot more than Bing.
Google responds well to the monis dot com command. Bing does not.
How about we tell the search engines to also look for just one tpe of trustorthy type of domain source?
The first ten Google pages show no .coms. There are a few .coms on the Bing pages.
This too shows a pattern where Google has no .com, and Bing lets a few in on each page, as well as a few .govs and .nets.
The first 100 results in Google are all .gov's.
Bing brings in very few .govs and brings in a mix of .coms, .orgs, and .nets.
Conclusion: At least with these words in this test, Google gets better results. In order to achieve clean results using The Minus Dot Com, it is necessary to add a second keyword command.