ballast and speed?

so im out with my friend on his buddies boat and he loads up his malibu with 4,500 lbs of ballast and then 5 people in it and basically the boat looks like it is under water. but once he gets it planed out he rides at 29-30 mph at 90 ft rope. its unreal how big he goes and makes a lot of other good wakeboarders just look mediocre. Do any of you ride like this or know people that do? i think it may just be a new way to go bigger and better? what do you think?