It's all nitpicking of course. "Most servers" is easily misread as many different server software products and not many different installations. It could have been clearer, that's all.
DNS is a system where flaws, like caching logic, easily can affect different implementations so it's important if the problem is with BIND or the DNS protocol. The BIND monoculture is a bit troublesome too, but that's another issue (I've used both TinyDNS and NSD in production but they all have issues of their own).