The thing slowing down your EL client isn't MEV
I started this looking for evidence that high-MEV blocks are harder for execution clients to process. The intuition is obvious: MEV blocks are full of complex DeFi interactions, sandwich attacks, arbitrage — all the state-thrashing stuff. Surely they're heavier to execute.
They're not. The correlation between MEV block value and newPayload execution time is r = −0.004. Essentially random noise.
What actually predicts execution latency is simpler and more boring: how much gas the block used.