You can take someone who's C-level (just coasting) at one company, transplant them to another company, and they might become an A-level player. If someone thinks the work they're doing is pointless, they're probably not going to invest much effort in that work, regardless of how smart they are. Put them in a situation where they really care about how well the company does, and you might see very different results.
Conversely, you can take someone who was A-level at one company, transplant them into another company, and find they're suddenly underperforming. If there's a culture mismatch or they think everyone around them is a doofus, they're probably not going to do a good job.
I think that the article's point is pretty much right on, unless someone's job is specifically to sell to people in the Scene. After all, if they're engaged in the Scene, they're probably not engaged with their work, and that's really what being an A-level player is about.
I submit that it is possible to enjoy the perks of the Scene like meeting other folks doing similar things, sharing ideas, comparing practices and so forth in moderation, without getting sucked into a time-wasting echo-chamber that doesn't provide any value.
There are higher-level attitudes like: "I won't commit to something I can't deliver / If I commit to something I will deliver" that may fall under your attitude categorization, and also correlate to the person's record.
(This doesn't capture all the people who could be A-players, or are at that level but aren't known to many.)