Yea, he would be better off just declaring for the draft than to transfer.. he could develop a lot more in 2 years of G-League play than he would sitting out one year then playing one more year of NCAA ball..I believed that it was just an internet rumor. It never made any sense to me. The general consensus appears to be that he needs at least another year to gain weight and get stronger before the NBA becomes a strong option. I don't see how sitting out a year helps him. That change in his twitter profile? seems to have been the spark that set the speculation off.
I guess that it takes very little to start something. I could see him at least exploring feedback from the pro folks but it would surprise me if he transferred.
Duke for one more year is the best option for him to develop though.