Personally I was quite surprised!
Someone in the UK has already posted that they have received the "PIP" line on their adsense account!
Of course it is also mentioned that this person is receiving their adsense payment by regular check.
It takes a lot longer to actually
get your adsense payment if you are getting it by check as opposed to if you were getting it via bank transfer.
Last year at this time there was a big discussion going on about how Adsense had to get the payments out before the end of the year for tax reasons
AND so that the people that worked at Adsense could take off for the holiday season. Mind you this was rumor and speculation!
Another factor to consider is that with the overseas publishers it takes them a lot longer to receive their adsense payment(s) and it is assumed that they will be receiving their "payment in progress" lines first. But again this is only speculation because the first reported "PIP" sighting has been from the UK (in check form)!
Bummer that the weekend is coming up (as far as the payment process goes). We should be hearing more about any further "payment in progress" sightings for this month - December 2008.
12/20/08 Latest Update(s)
Well it seems that someone in India has posted that they have gotten their "PIP" line!
So far it seems that those who are getting their adsense payments by regular check are seeing their "payment in progress" lines first!