Physics doesn't change across national boundaries
Gary is writing based on decades of accummulated knowledge of the physics of atmospheric reentry. NIH (not invented here) just doesn't apply.
While I hope Beagle2 lands successfully, it sounds from Gary's post that the development team may have had to cut too many corners in order to live within very tight budget constraints. The history of Mars exploration is filled with more failures than successes. We'll know in a few days whether they got it right or not. Let's hope for the best.