Based on what has happened in many BC lakes, I think there is a good chance we will see some fatter 20" fish in three years. Results will vary due to differences in water chemistry, food availability, disease resistance, water temp adaptation and angling pressure etc. I think it is a good idea to try this experiment. If stocking numbers continue to decrease we will eventually get some serious growth.
Triploids are not a new species, just a genetically altered strain of the same old thing.