In my experience, Baja's do have slow hulls, but this guy should be able to hit more than 82. Maybe he didn't have it trimmed out right. I've seen 23 foot Baja's in the 450hp range do high 70's. I don't think that Bajas are known for solid rides in rough water. You want a V that rides well in rough water, and hauls butt, then you need to get out your checkbook, and get a Cigarette. I think Baja's are more the Chevy Camaro of power boats.
As a side note, a guy on the river here has a cat that I have never seen opened up, but it cruises comfortably at around 65. Cats are amazing. If money were no object, there would be a Skater parked next to the X Star.