I dont think so and i dont see it happening anytime soon because if you compare what’s happening now to what happened in 2017 then you would see that btc price is 19% higher that 2017 while ethereum is just breaking about 5% increase from 2018 and bitcoin Is never a thing of the past
your calculation based on the gap between the bitcoin price and bitcoin old ATH price. It was almost doubled and ethereum is only getting a small gap after it's increasing to $1600 for each ethereum while the old ATH was around $1355
Bitcoin is not leading the anytime as per the trend can be changed anytime. The market doesn't always need bitcoin to do that.
That being said if ethereum can lead the bull market. It's not relevant to use the gap between the current price and old ATH to determine which coin leads the bullish market.
The trend will not see from that factor.