I think that most tuners use silicone to fix this, as metal will still expand in heat. I'm not totally sure though. Was he pointing out the cold or hot side of the turbo?
I haven't seen any silicone or hard pipe kits yet for the ST, but I'm sure someone will make them. Samco made a kit for the last ST, so I'd imagine they'll make one for the 2013. It sounds kind of like this is what he was pointing out.