The ad hominems against Gruber (and they are ad hominems) stem from the fact that he shows no ability to think, or write, anything that Apple doesn't deem he should think and write (in regards to Apple). He is, for all intents and purposes, a member of their marketing department, yet he is at least nominally an independent blogger and reviewer.
There's nothing wrong with liking Apple. They make great products. But to so uncritically buy into the hype and narrative, then claim independence of thought and word, rubs many people the wrong way.
To the extent that Apple's marketing narrative is factually accurate (which you readily admit), why is accepting it bad?
Factual accuracy is not the be-all and end-all of what makes a marketing narrative a good thing on which to base your opinions and what you tell others.
>(which you readily admit)
I did no such thing. I said they make great products.
This is not true. He shows some ability. Three recent examples:
1) http://daringfireball.net/linked/2011/10/26/against-skeuomor... 2) http://daringfireball.net/linked/2012/01/19/ibooks-author-eu... 3) http://daringfireball.net/linked/2012/03/13/att-4g
I'm not going to bother digging through his archives to prove this (it wouldn't take much to do, but you're not actually arguing against Gruber as much as your skewed conception of Gruber), but I'm fairly certain that Gruber's reaction to Ping is "confusion" (at best) to "dislike" (at worst), not like.
It's not hard to find cases where Gruber has had a negative reaction to something that Apple has done, or where he's said something negative about an Apple product.
That's close enough to "liked Ping" in my book.
Obviously, Gruber doesn't like every little thing about every Apple product. But I'm pretty sure it's not an exaggeration to say that he likes every Apple product.
http://www.google.com/search?client=safari&rls=en&q=...
There's no evidence he's ever used Safari (or iTunes, for that matter) for Windows.
Gruber is also consistently down on Apple for their opaque and arbitrary App Store policies, especially when they hamstring potentially great apps.
http://www.flickr.com/photos/gruber/6648080689/in/photostrea...