For the record, it took 23 minutes to run the tests for me. (running the tests from the /elasticsearch directory only).

I'm located in London UK, while the ES instance I've been using is a micro instance running on AWS in North Virginia (zone us-east-1) so I expect quite bad latency - in fact I measured about 440 milliseconds for a round trip.

I'll also set it up on our CI environment, which is located in a different AWS zone but also in North Virginia.. unfortunately some coding changes will be needed to allow injecting hostname overrides as a property, and to make it compatible with this ES version too (I got 85 test failures out of 464).