Maybe instead of A Bigger Bang, the Rolling Stones should have called it the Not Dead Yet Tour. The consensus among reviewers of last night’s tour opener at Boston’s Fenway Park seems to be amazement that these sexagenarians can still sing and play their instruments for two hours. Or else, that they played at a venerable ballpark not known for its friendliness to arena-rock shows. Few were willing to look beyond the ancient lineages of the Stones, Fenway, and headline clichés to offer an original opinion — except maybe Matt Drudge, whose headline referred to the rockers as the ”Strolling Bones.” Irreverent but funnier than most of these: