Well said. Responsive design has been around for a while, and I've seen it used well. But not every site has a need to support every combination of big/small/fast/slow devices.
I agree with everything he mentioned up until he started criticizing the today's standard and practices, he ignores the issues you run into in today's environment based on what you've said:
media queries vs two separate projects - responsive and flexible one site fits all approach vs less resources served for smaller mobile version and reduce complexity(?).
web fonts / assets management - this is a growth issue or a design issue focusing on either OECD/Fast Internet or Server Load. It is somewhat an issue, but not something to cry over really.
his complaint about his textarea box are ill founded. He's using posterous' system, and should build his own if he doesn't like it so much. Isn't it a free service?
modal / gui decisions - usually client/manager driven. Can't blame me on this one. I'm all about pages and lightboxes.
his complaint about mobile browsing is one that is justified, but one that isn't any modern developers fault. My first 10 sites were all responsive. Now some clients don't want it. How is this my fault? This does take extra time and consideration, unless a client wants a very simply mobile site only.
