Absolutely. I happen to need these bits so zeromq is a non-starter for me. I am mildly annoyed by the "we are faster" rhetoric without the "but we only support a small subset of the useful things you can do with a message queue" caveat, but it is a mostly meaningless bit of marketing so I can let it slide; anyone who really needs those sorts of speeds knows how to actually evaluate products and is unlikely to be suckered by a false dichotomy setup like the one on the zeromq home page.