Given what Rudi has posted about the way Miles & More counts its miles, this is not very much compared to what many accounts have earned over the years by many FlyerTalkers. How many miles does he cash in each year? Or is he travelling so much, he never does cash them in?
I passed the 2 million miles point a few years ago, before Canadian folded into Air Canada's program, and had another 1.5 million earned in Aeroplan. That would translate into a lot more in LH given all the F and J trips which yield many times that number. And I certainly don't consider myself that heavy a traveller.
I'd say an average account balance of 250K to 300K miles would be the norm for many FTers, and that would be after several award withdrawls each year too.