First - "they" claimed that it would be the "biggest telescope in the world!"  It isn't.  The 39 meters of the European Extremely Large Telescope, presently under construction in Chile, makes the 30 meters of the TMT a dwarf by more than 60% of light collecting ability.  Then "they" claimed that the TMT is the first telescope to be designed "with built-in" adaptive optics.  "They" may be right.  "They" are finally getting it fairly correct now - claiming the TMT, if it is built, to be the biggest telescope "in the Northern Hemisphere. "