In a world when all that really matters is what the customer DOES with the information you put out there, the notion of the thud factor and the stacks of clips as a measure of success certainly deserve to go the way of the mimeo machine and the rotary phone.
I have to argue one point (and would have done so on her blog, but I categorically refuse to comment on any blog that requires registration in order to comment. Pitchengine, it is clear you do NOT want to have a conversation with me, you just want my email so you can spam me) so I'll make my observations here.
Where she really gets it wrong is that you can't quantify engagement. Indeed, you can. You can use Stowe Boyd's Conversation Index to see whether people are commenting (clearly I'm NOT engaged enough in what Pitchengine has to say, since I'm not commenting there.) You can use any of Eric Peterson's engagement metrics and get a very good idea of how many people are really engaging with what you have to say. You can actually do something as radical and old fashioned as asking them how engaged they feel. Would they recommend the brand? Do they value their relationships with this brand more than others?
Engagement is highly measureable and highly quantifiable, you just have to know the right questions or metrics to look for.