In the "How to Prepare for a Meeting" Mark stresses that despite the fact that there are more and more virtual meetings, face to face meetings are still very, very important. So we should prepare for them and actively participate.
I agree that we should prepare and actively participate in meetings but in my opinion we shouldn't treat face to face meetings differently than any other type of meetings. Virtual meetings and conference calls require preparation and active participation too!
So Manager Tools' advice has much broader application than for face to face meetings only.