Negative. After the yellow flag erased his lead between laps 25-30, he was able to get ahead by 3.2 seconds in one lap after the restart. After that he gains about 2 seconds per lap. They are definitely using something, especially with that engine audio signature.

Personally, I wouldn't outright call it cheating, since it's within the rules, which is what F1 presumably wants, but it is against the spirit of anti-traction control rules.