Its inevitable at this point that Polansky will be the top Canadian player by the end of the year. Frank has never been able to build on solid results and become a consistent player, and I doubt that will happen now that his ranking wont allow him to do anything but enter challengers and qualifiers this summer.
Yeah it seems Frank has two or three good weeks a year, sandwiched by long strings of first round losses. He definitely he has the talent to be a top 50ish player but I think, realistically, he will hover around the 100-150 mark for the rest of his career.
But I haven't been following his career because I expect him to win a bunch of tournaments, I just love the way he plays tennis.