thanks bootstrap, jonathan.
It would be really nice to be able to make it configurable, because we execute the majority of our tests using a cloud service, where each second of usage means $. If we could tweak the polling interval easily, it's gonna be easier to found out the right values for our tests. Another usage would be to change it programatically for executing on an android driver with 250ms and on an IOS driver with 300 ms, for example.
If you multiply 250ms per 1000 tests per each suite execution, it's a lot of time.
Thanks again for your quick answer!