MrT,
Yes, I have tried large Maggies in a small room also.
Not that they can't work there, more that large speakers (including Maggies) are harder to place especially in smaller rooms so getting the the right setup can be more of a challenge.
Also, good large speakers tend to cost a lot more than good small speakers, so getting these for a small room may be overkill and also be harder to get to sound right or even to achieve their potential, even if placement is not an issue. Sometimes less is more, especially in smaller rooms.