This is a bit of a pet peeve of mine, but anyways: not every player is equally good on the power play. Much like every player isn't equally good on the penalty kill, or equally good defensively, or equally strong at protecting the puck along the boards, or equally fast on their skates, or equally punishing hitters, or.... okay. To me it's seems really really super odd that Washington wouldn't use their best (or regularly most productive point producing) even strength forward that much on the PP. Like, what? Unless.... wait.
What about the thought that Dennis Maruk perhaps possessed skills that translated very well to the power play, and that's why he scored the most power play points since Gretzky (along with the opportunities obviously, because even I understand you can't score that much on the PP if you're not given that many PPs). There shouldn't have been much in the way of playing Gartner more on the power play, because it's not like all-situations players are unheard of.
Speedy wingers with a penchant for flying and shooting often doesn't translate magically to the power play, which to a large degree is about set-plays, slowing it down a little and clap-clap-clap. Grabner, Hagelin, Helm, Chimera. It's still possible though. Bure for instance often used to quarterback it from the point, which is still a skill. Because not everyone is equally good at quarterbacking it from the point either.
Gartner leading his team in even strength points 5 times out of 8 is good obviously, and I don't think anyone's in this thread really trying to say Gartner wasn't good, or even very good (at scoring goals), but if his forward teammates were so lousy as some posters here are trying to paint a picture of, shouldn't Gartner have done it 6 or 7 times instead?
Mike Ridley out-paced Gartner that year, so I don't buy the argument that Gartner made him, particularly not since he had a PPG season the next season without Gartner and another one two years down the road.