WizarDru
Adventurer
Its a funny thing, but I remember being involved in gaming stores in the early 90's when people were saying CCGs and video games would kill tabletop RPGs. Hmm its 20 years later and DnD is still apparently dieing.
It should be mentioned that CCGs DID help kill TSR (which could have killed D&D)...but not by competition, but by the contribution of poor sales of Spellfire and anticipating a larger than existing demand.
The question many people are really asking, in essence, is this "Did the edition I like WIN?" WotC has no vested interest in sharing their financials with anyone but Hasbro, who has no desire to share that information at all.
Discussions of 4E PHB sales, as has been mentioned upthread, is indicative of nothing within a vacuum. We don't even know if WotC considers PHB sales important to their business strategy, let alone to the success of D&D as a brand. Are DDI subscriptions their actual goal? Minis sales? PDFs? Do they want to drive brand knowledge for Hasbro, rather than WotC's individual finances (and thus act as a driver to things like software products)? We don't know. And without knowing how WotC gauges success, it's pure speculation.
We know that Paizo wants to sell Pathfinder books and supplements. With WotC, their strategy could be broader, especially if driven from Hasbro. Comparisons cannot be direct, by necessity.