This might come off as self-congratulatory. Or it might sound like I’m surprised.
Both are correct.
I’ve mentioned Henry Blodget here a couple of times, Seth Godin repeatedly. If you read what I think about Blodget and what I have to say about Godin you’ll see that I have widely different opinions of these two very successful men. But today I praise Henry Blodget for pointing out something I’ve been saying for quite a while: attention spans have shrunken to very nearly zero.