As you might expect, I did not take Mr Farraday's suggestion at all seriously that
afternoon, regarding it as just another instance of an American gentleman's
unfamiliarity with what was and what was not commonly done in England.
Can might here mean certainly? Or it has its usual sense, that is probably?
Best Answer
I believe the phrase is idiomatic, and the expression simply means "as expected," or "as can be reasonably expected." A synonym would be unsurprisingly, while a similar idiom would be "it's no surprise that..."
One book mention that the phrase can help put two people "on the same side of the fence":
I think might gets used in this phrase because it sounds more polite and less presumptuous than, say, "As you would surely expect." For all practical purposes, that phrase would pretty much mean the same thing, but might is gentler, and allows for the possibility that the other person might actually be surprised instead.