I agree with that, but beyond it's factual inaccuracies, I'm sure you would agree that Jamason's third paragraph went well beyond the discussion of the relative greatness of the two goals and why they are remembered as they are:
"Orr was a great player, but he also arrived at a time when the league had just doubled in size, the WHA was starting, and coaches were just beginning to let defencemen carry the puck. (Toe Blake told Doug Harvey, another great skating defenceman, that he would be fined every time he carried the puck across centre.) Orr was a large part of the team that won a couple of cups for Cherry, and Don has been telling everyone that Orr is the greatest player of all time ever since."
Furthermore, Boston was an Original Six team with a national following and Orr's fame was already well established when the "flying" goal was scored. The picture didn't make the legend, it just added to it. The bottom line is that the Orr goal got the greater play because Orr was who he was and Boston was who they were, while the Islander's dynasty, for all of it's greatness, was never embraced nationally, oddly and particularly in the US, and pretty much remained a possession of the people of LI throughout.