I saw them in 2010 at a number of locations. In 2011 a woman who lives on one of the tributaries out in Belle River, Ontario, outside of Windsor sent me a whole series of photographs and said that they couldn't navigate boats through their little waterway because it was choked with these plants.
Either the plants are surviving when they are not supposed to, and I don't think that's happening, or they're reproducing when they're not supposed to, and we don't think that's happening. What we think is the most plausible thing is that people are purchasing them in local stores—pond shops—and if they have too many of them growing in their pond by midsummer to late summer, they take some of them and dispose of them in areas where they shouldn't, and they end up in the Great Lakes.