I'd have to see who said it and how before judging my reaction to it in context. Do you have a source?
As I said above, no, because the Wizards website has been completely deleted and replaced at least twice since then. It has, after all, been more than a decade.
I gave the transcription above. Mearls explicitly referred to Warlords as making hands "grow back" by "shouting" at people--and his immediate "now I'm being ridiculous" comment did not actually fix the problem. He was, openly, using edition-war screeds as reasons why 4e options should be excluded from 5e. Was he being the worst he possibly could? No. He was clearly
trying to joke around. It's just a crappy thing to joke about given how
gleeful so many people are about crapping on 4e, putting it down, dismissing anything good it ever did, or (worst of all, because it is entirely innocent)
erasing it because they think awesome stuff 4e did was brand-new to 5e.
Sadly, I don't remember who on the dev team wrote the post about dragonborn, I can only tell you that it was really tone-deaf, cracking some rather weak jokes that basically boiled down to a stand-up comedian saying, "Dragonborn fans, am I right? What weirdos!" From context, it was clear he was trying to sound tongue-in-cheek, as in, making intentionally hyperbolic statements when he actually doesn't personally care that much, but I've endured more than enough of people telling me I don't deserve to have my preferences represented in D&D. Joking about it isn't funny--it's a very real experience I've had.
Wizards has deleted many things from the playtest period. More than a few of them were rather inconvenient things, like the poll that showed Warlord quite a bit more popular than Druid (which was in last place, and by a significant margin.)