You're not wrong.Apple: 20% faster
real world usage: same sht
Yeah, 20% faster is a big deal for sustained performance, like a 30 minute process improves down to 24 minutes process, saving 6 minutes, and time is money. People doing that kind of time-laborious work need all the processing improvement they can get, to cut down on wait time.
But for a MacBook Air users—going from 3 seconds down to 2.4 seconds is still going to feel like 3 seconds. It doesn't matter. We're not doing long-term processing, we're opening documents and closing documents.
For MacBook Air users, I say wait for single core speeds to at least double or triple before considering an upgrade. Otherwise it won't feel like an upgrade.