Ethereums performance today is quite impressive! + 26%! surpassing AMD, Blackrock, Square and American Express when compared by Market Cap.
Full list:
https://8marketcap.com/I think there is a mistake here, although the price of Ethereum is increasing today, but the increase is not 26% like what you said (on coinmarketcap the increase in Ethereum for today is only 7.67%), so I think you might be wrong about the price increase from Ethereum today (the increase in the price of Ethereum was only around 7% and not 26%), although I'm sure if the price of Ethereum will definitely increase very high in the near future, but for today the price of Ethereum hasn't risen very high like you said.
If we are looking on the it, both of the site you mentioned (8marketcap and coinmarketcap) have the same percentage in increase, its just the time interval when you look at it. Right now, its just 3.27%, different from the 26% and 7.67% you both have mentioned.
Ergo, the 26% increase that he stated is true, also 7.67% increase is also true. Just difference in time when you look at it in the market.