We do know that there are normally small variances between two labs testing the same product, although they are normally less than five per cent in impact testing. Our best judgment at this point is that there is a problem, but it is a small problem, and can probably be cured by adding tiny amounts of plastic to the buckle designs to strengthen them and provide a more generous allowance for lab testing variance, plastic variance and molding problems. We are probably never going to have more definitive public data on the subject. Later, much later. They selected a Louis Garneau model, the Globe, as a Best Buy.
Any helmet is safer than no helmet.
If you find one of the ones identified above, you can decide whether to replace it or not. Consumer Reports did the testing, and they stopped short of recommending replacement, although they did recommend avoiding those buckles if you are buying a new helmet. The buckles all passed the Snell tests, indicating that they are not going to break in actual use, and failed only on the more severe ASTM test. But if you do have one of those date codes and the idea of it bothers you every time you use the helmet, it will probably be worth it to you to replace it even if you have to pay for the new buckle. We would, just because the lab tests indicate some marginal buckles in those batches, and some individual buckle in those batches may be even worse than the ones CU broke.