People can pay for faster research times. That doesn't mean they'll do more DPS in PvE or PvP. So I don't see it as P2W, I see it as impatient. P2W in my opinion would be certain crown consumable items give more bonus Stats that our current Major/Minor buff system doesn't. Lets goof and say ZoS added a "Crown Potion of Battle" and makes you deal 10-20% bonus damage in PvP. That would be P2W
I believe P2w by default just means to pay for services which would reduce the time to obtain something in game months - years to accomplish without paying for it.
Pay To Win
Pay To Win AKA P2W. when you are paying for advantage which normal players don't have access to unless they either pay too or will have to grind very long (weeks and months).