Keith, planars are notorious for being difficult to measure (that's why Magnepan doesn't send Stereophile products to review). Those who measure them the same way they do drivers-in-a-box loudspeakers, and then listen to confirm their measurements, are bound to find fault.
The best things an LRS owner can do to maximize their sound is: 1- get them 5' in front of the wall behind them if possible, 3' minimum. 2- feed them as much power as is reasonably possible (200w/ch is good). 3- augment them with a sub or four. The Rythmik and GR Research subs are finding favour with Maggie owners: the OB/Dipole if you're a fanatic, the F12, F12G, or F15 if you're not.