A contrary view ...

Herewith the very interesting updated view of Hudson Barton, see also his input in the previous post here.
He says:
The "peak" number is nice for media reporting, but it does not actually tell us much about the growth of Skype. Here is my observation based upon a different way of looking at the "concurrent online" data.Growth in the last month is showing increasing variation between Europe, America, and Asia. Whereas historically the three regions have grown at a similar pace, with Asia slightly underperforming, in more recent days American and Asian growth has picked up while European growth has faltered relatively. Here is the growth from 10/11 to 11/8 (precisely 4 weeks) as measured at the time of each continent's greatest relevance.

We'll see if this trend continues. I suspect it will.