Your argument is certainly valid, and as we've sort of thrown open the door to discuss this whole topic with a feature in the new Price Guide before we announce the results in next year's Guide, everybody has a whole year to continue to provide feedback on what they think.
By "too late," I was unclear and I apologize. I just meant that based on a lot of discussions we've had about the shift in maturity and focus of comics around that period, the changes taking place at Marvel, the advent of the horror stuff, and tons of other factors, it just looks to us like a major shift had already begun well *before* the new X-Men thing came along, and that shift seems likelier as a dividing line for an Age.
But again, the fact that this is always fertile ground for discussion just proves that it isn't easy to define. So that's why we're hoping all these opinions get thrown at us as the year goes on.
Arnold