Does anyone really believe that Falcon 9 Heavy can lift 66,000 pounds more to orbit than Delta IV Heavy while using lower ISP propellants?
I don't believe that the Falcon Heavy that SpaceX has described
can lift 53 tonnes to LEO, but the trick the company has used more than once now is to publicize a payload goal while developing a Block 1 rocket that won't actually achieve the goal. Everyone studies the rocket on the launch pad while scratching their heads, but they are looking at what is in effect a ruse. It is the follow-on design, or the follow-on after that, that aim toward the announced goal.
- Ed Kyle