Maybe, but it seems quite logical to me that the coolant and oil are being forced out because of combustion chamber leaks. I just read a post on the forum the other day where the OP complained of foaming oil as well as oil leakage.Not sure about the experience of others but the head gasket failures I have seen on the EJ25 SOHC motors have never involved the compression area of the cylinder. The ones I have seen have always involved either the water jacket leaking to the outside of the engine and/or the oil galleries leaking to the outside of the engine.
This is why texting for combustion gases in the coolant is not a good test for failed head gaskets in EJ25 engines.
I am aware that some people report a failure in the combustion chamber part of the head gasket but I have never seen one myself, maybe because I choose to replace the head gaskets when there are signs of coolant or oil leaking.