And yet nothing starts a good edition war like a negative-things-only first post!
Is it me, or have the anti-groggites been coming out of the woodwork lately?

Of course I did. Here, let me quote the relevant part of it for you, with my emphasis: "To that end, I've decided to compile a list ... of things about D&D, old-school and new-school alike, that I really honestly wouldn't mind seeing changed or even absent from 5th edition."Negative things only? Did you read the post?
When I use the term "grognard" it's only for people who are so enamored with their personal favourite versions, that not only they refuse to progress to the next edition just because it dared to change something (then I'd just not like them for stagnation-ism), but also impose their own personal views on everybody else. Like:
A: "PHB should have only the Tolkien races because they're the classic D&D"
B: "Why should we only have the 'classic' races?"
A: "Because they're classic, dumass. They - and only they - should be there because that's where the game started."
B: "Yeah, and we progressed since, and have some actually original and interesting races."
A: "I don't care, only classics can be in the core."
B: "Okay, so you will have classics in the core AND I will have my 'freak' races. So we both can play what we like."
A: "NO BECAUSE MY PREFERENCES TRUMP EVERYBODY ELSES PREFERENCES AND ONLY WHAT I LIKE CAN EVER BE IN THE CORE"
That's a sample of what I call a grognard. Person so stuck-up in their personal, archaic preferences, they're actually willing to take content away from other people because of some misguided sense of "classicity" and "traditionalism". And that's why I'm "anti" them. Because they're harmful to my style of play, by (intending to) removing options the game gives me.
It isn't just 4e folk that behave badly. Everytime an edition has come to a close and a new edition is on the horizon a few folks act out in their fear, uncertainty, and doubt (FUD).
FUD does funny things to people, they start looking for someone to blame and old-schoolers seem to be the current target.
Everything about D&D Next has pointed to older editions as a source of inspiration and those 4e folks aren't seeing where they fit into the new picture.
Unfortunately, the fiddy bits that will add 3e and 4e style of play haven't been written yet. The core system appears to be a rules light system.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.