Can't help but think that these predictions of huge margins are way optimistic:
Italy will not lie down - they are all professional players and, even if England dominate possession, they have yet to demonstrate that they can convert that into points.
Similarly Scotland - they may not have much to offer in attack but I would expect their defence to do better than a 20 to 25 point difference.
Ireland have shipped 29 points in 4 games and scored 110 - it's hard to see how a flaky French side will reverse that pattern to such an extent. My money is on a comfortable Irish win.