Could just be the regional style; that's where he is from. But heart tells me it's him.
Have you seen the recent interview with the actor that plays him? He was asked if Syrio had a close relationship with the HoBaW and he originally agreed that yes he did before backtracking and saying well really just Braavos.
Why must I always be the isle of crazy alone in an ocean of sensibility? The should to everybody else’s shouldn’t? The I-will to their better-nots?