No, I think it is not. Imagine I call you "Oh, don't be so old and grumpy and stuck in your ways" in a silly internet debate to express I think you focus too much on unimportant and informationless detail (Note I'm not doing it, this is just for the sake of the argument here).
Now someone comes along and claims you are "old", based on that statement. My line was a worthless statement in regard to carrying actual information very similar to Belkar making jokes or Roy trash-talking to Miko.
Yes, it is worth bringing up but not worth talking more for three posts about it and then dismissing it as "joke" or "trash talk". Roy's comment does not carry more information than "Roy thinks Shojo is old" for which we need no evidence at all (and it surely does not tell us how old Shojo is).