Will potentially make a decent difference, triangles are very stiff shapes. Could well be that they've done it as the grill was flexing too much to pass the test? Assume they haven't just chucked it on for fun anyway.
Possibly, but it's inly one extra bar effectively. I may be wrong but I can't see that making or breaking the deal for the testing though, as I think it each grille only takes one hit each?