[NTG-context] \inch not doing the expected thing (what I expect, anyway).

Hi, I would expect (*cough*) \starttext 2\inch \stoptext to output something like 2" with some appropriate typographic symbols following the 2. Instead, I get a 2 with a large prime symbol down lower than a prime symbol should be, and then a second prime symbol at about the correct size and at about the right distance up from the baseline. Are my expectations about what \inch should do incorrect? I do notice that $2\inch$ does what I expect, but if I have to enter math mode, I may as well type $2''$ to get what I want. In summary, is \inch working as intended or it is broken? Thanks. Jim