Just don't see that holding true. Irrespective of other leagues, more or less every team goes full pelt for 90 minutes all season long here. The quality isn't that high, particularly defensively. which invariably leads to great excitement. But there's very rarely easy matches for anyone over the course of a season.
Just watch some BL games, it's visible to the naked eye, don't even need any stats.
Back when England was tormenting our NT in WC/Euro quals throughout the 90s, I was always scared shitless before these games, because you've played like on fast forward. It seemed that all your players have 4 lungs. The 96's team was ******* terrifying, they were running like on cocaine and had technical ability to support it too.
And we had really solid team back then. We played very close games vs France in the WC 98 quals, we could fight Italy, we could fight the Dutch, but England would always run us off the pitch bleeding.
But now? We could go toe to toe and you wouldn't see who's more physically fit. The world has caught up long ago, and the intensity of Premier League is just an outdated meme.