It means that, as far as is known, this is the record. The Russian record is of course taking them at their word, but isn't it odd that they never flew the thing? If anyone had topped that since, they'd have announced it. The main accomplishments of the Soviet and post-Soviet space programs has been bragging and hyperbole.
To be truthful I really don’t know how to compare Space X with Russian rocket products.
What I do know is that for several years, American space flights were on Russian rockets. I assume that there have been improvements as time went by.
The good thing is that a corporate American company has developed a great product that puts America back in the space business
it would seem so... if thy had it, i think they’d use it