AirBnB took quite a while before they started growing. If they had done YC in the first month of their existence, do you think that growth would've happened A

AirBnB took quite a while before they started growing. If they had done YC in the first month of their existence, do you think that growth would've happened A LOT sooner? I think it would've helped considerably but I think some startups just need to "age" for a while. Ben / Pinterest had a similar long/flat growth line before they started to take off. On the other hand, maybe those "taking off" moments were a result of advice from smart folks (like YC).