i read that about the pannys also but that applied to the 06 and 7 models. 2009's were solid while 2010 cant really be judges for reliability yet , you can be sure they will be fine based off of the 2009 models performance. Just make sure you get the plasma coverage with best buy it covers everything. burn in, black levels, etc
No the 2009 models had problems.
Tests point to extent of loss in Panasonic plasma black-level performance | Crave - CNET
That is just one of many articels that shows it and if you go over to avs and look for posts by d-nice you can find many things reguarding the 2009s.
Have not seem much on the 2010 models but I have also not been looking.