Oh come on. Everything he has done in F1 up until now - that first BMW practice drive, his BMW debut, his first season at Toro Rosso, running continuously in the top 10 in a Toro Rosso (think back to how good he was in Hamilton's champion-winning season - he nearly denied Hamilton the title too),
pole and a lights-to-flag victory in a Toro Rosso, four time straight WDC. He is undoubtedly a fantastic driver.
His recent domination is because he mastered the mashing of the throttle and letting the diffuser pick up the gasses from the exhaust, and he was the only driver in the field capable of believing the car would stick so readily (hence him opening up 4 second leads in 2 laps). That was his era.
The confidence you must lose from that to the extreme torque these 1.6s have must be enormous. That he is struggling to adapt to these completely different cars might be a blemish against him if he doesn't get the upper hand in the next couple of seasons, but it is only a blemish that would mark him outside of the very top echelons of F1 greatness with Fangio, Clark, Senna, Schumacher and Alonso, but he's right behind them in the next bracket alongside the likes of Moss, Brabham, Stewart, Prost and Hamilton.
I'm not taking anything away from Ricciardo, who's clearly a champion in the making, but the fact Vettel is struggling relatively does not suddenly mark him down as average.