I suggest you look a little deeper into the same web site 1 - Tests as it lists the results against many of the firewalls you mention but not all of them. http://www.firewallleaktester.com/tests.htm
The results are however, getting a little long in the tooth.
Yes and that’s unbelievable… and they will abandon that project ?!! Unbelievable ! Somone needs to buy that project ASAP… I was checking it on my other system, and it works as a charm. Unbelievable configurable and best of all, stable. ZoneAlarm is wonderful but still eats little bit more of system resources than Kerio. Tens of wonderful options/features… Kerio firewal must not “die”.