I've got White GTS with black plates... I wasn't on mounts bay road yesterday morning - unless you mean the last little bit just after the freeway exit heading in to the city (near convention centre). If thats where you saw it, it could have been me.

Yep that's the one. After all the anguish of having to wait for mine and going for a test drive on Wednesday night, you pulled up next to me at the lights just to rub it in lol