As a founder your job is to take the high road as much as possible while still pushing through the strengths of your company. It seems pretty obvious that NYT won't be changing their opinion, and maybe even reached out to Musk to confirm this suspicion. If Musk were to reply to this negatively he'd essentially be feeding an ever-lasting flame. He's taking the best parts, spinning them to those who care about his product, and is continuing on with building out a great product.

Not to mention, he's gotten a lot of good press from other media sources since (as he points out in his blog post).