Wow, you really are bigoted against US citizens sometimes, aren't you?
At least among people I know, there is the "among friends" definition, and then the actual, pedantic definition. In casual conversation, the former is used, as we all understand it isn't precise, but we don't mind, as we are being informal. For instance, among friends, pi is roughly 3, g is roughly 10, a square meter is roughly 10 square feet, etc. It just makes quick and dirty estimates easy. We know we're a little under, a little over, and a little under, respectively, but that's ok, because we all know it, and if we want a more precise answer, we can do it ourselves.
Then there is the pedantic definition of things. This is used when dealing with academic or professional writing, or similar speaking or lecture needs. We use this when precision matters, when a specific phrasing is necessary in order to mean what it needs to mean. Think math definitions, for instance.
Now, colloquially, among friends, the capacitive based keyboards use capacitive switches. In a pedantic sense, this is also true, as the switch closes, and current flows. There is nothing, anywhere, in the definition of a switch that says the current has to flow THROUGH the switch, just that the switch controls the flow of the current. Look in the OED or an electrical engineering text book if you feel like arguing with me.
Now, there are other definitions of a switch, usually preceded by other words, which imply the current is passing through the switch itself. This is the definition that The Solutor is apparently using, and it is much more specialized, which is why it's usually not called just a "switch". There is nothing wrong with this, in and of itself, except for the way in which he uses it to press his apparent bigotry, and seeming superiority complex.
Personally, I don't care for the generalization he has been making regarding US citizens, as I find it offensive. I also find it offensive that he chooses to pounce on every user who uses terms in their dictionary, rather than specialized meanings. This is supposed to be a friendly forum, where uses exchange knowledge and advice regarding keyboards and keyboard technology. Emphasis on friendly. No pouncing on people, especially newer users. It drives them away, and it alienates others. Please stop.