I have had a couple of clients that are like this:

You spend a lot of time working on a system design, a project study, a site map, and a wireframe. You lovingly package your work and present it to them, looking for positive or even negative feedback — something that at least acknowledges your work and skill, or at least something that shows them that they care about THEIR project, only to be met with a singular “OK”.

What part of “OK” answers the questions “please give me feedback”, “do you have any suggestions”, or “kindly guide us with the site map”?

No Sir / Ma’am, it is definitely not “OK”. Not providing feedback forces me to guess what you want, and unless I have Professor X’s mind-reading abilities, I sincerely doubt that.

What would more or less happen is this: work will proceed on the early comp that the client “Okayed” and, unless we are talking about a one-page website or a logo, then expect a couple of major revisions come prime time.

Note to client:

Unless you are willing to accept anything I throw at you as the finished product without any resistance, then no, it is not “OK”. This is your project, so give us some feedback. Ok?