I do agree that the author seems entirely too focused on Western RPGs; I love both genres but he simply seems entirely biased against JRPGs, he also seems to have a bias against modern WRPGs. Don't get me wrong, the older WRPGs are great and worth mentioning, but he fails to mention anything more modern from WRPGs than Baldur's Gate aside from WoW. What about Neverwinter Nights which revolutionized how we look at the modern WRPG? Diablo? Mass Effect? The Witcher? All of these could easily be mentioned as excellent examples of how WRPGs continue to push the boundaries of good design.
I do however disagree with you that it's a "a real struggle" to find a decent WRPG lately and that good JRPGs are everywhere and that they contain more content. Recent, excellent WRPGs that I would point to are Mass Effect, Fallout 3 and The Witcher, all of which are pushing combat for the modern WRPG into something more real-time. The only two excellent JRPGs that I can think of are Valkyria Chronicles and Persona 4 (and I'm not a fan of the Persona series, though I do love the Shin Megami Tensei series); to be certain there are more JRPGs out there, but I find many of them to be somewhere in the middle, I enjoyed them, but they weren't incredible. Modern WRPGs tend to be less common now, but higher in overall quality when released. As far as content, JRPGs tend to have a lot of content for 1-2 playthroughs (usually 1, realistically), you play through once and find all the nooks and crannies, "finish" the game and maybe playthrough every great while to experience the story again. WRPGs tend to focus on multiple playthroughs, it's impossible in most for you to experience everything the game has to offer in one playthrough as one type of character, you have to go through multiple times and that's where the content really shines.
Overall, I love both genres, but this guy doesn't really seem to know either one that well; he's stuck in the past, which is fine for him, but I'd hardly consider his list as authoritative.