Actually, I saw an article that indicated that the author (and automotive columnist), who wrote the USA Today piece, thought it was a bad idea to use the Hummer name with its negative connotations (among some/many) and that EV is not the way to go for an off-road vehicle (based on its high price and difficulty of repairs). So, if that’s paraphrased properly, he feels that it has a couple of strikes against it from the start.
A nice thing about electric motors is their efficiency stays relatively high at low loads compared to ICE.
So if it’s driven in a non-maniacal way the range won’t be abysmal.
OTOH the 1000 hp motor(s) will be heavier, reducing range a bit that way.