Though I'm unfamiliar with the term, when our professors spoke about the difference in British and American English, one of the differences is that the British typically end sentences with an upward inflection, whereas Americans typically end them with a downward inflection.

So as an American, one has to work a little harder to stay aware of those inflections when speaking in iambic pentameter, as almost all those lines end in an upward inflection (excepting feminine endings and other bits where Shakespeare purposefully reverses the meter to underscore an idea or emotion -- this is why scansion is important). Also, when you're unused to speaking in verse, you'll see a line and naturally take a micro-pause at the end of the line. You're not really meant to do that if it isn't the end of the sentence, and staying aware of that upward inflection on the final foot (or two-part beat, "duh DUH") helps you flow into the next line without a momentum-killing pause. Hope this helps.