Can Germany do quite well while the rest of the euro zone is struggling?

"Various surveys seem to show that Germany's economic situation is likely to be decent in 2013 (even though the fourth quarter of 2012 was poor) while that of the rest of the euro zone is likely to be very poor. 
Can there really be such a gap between Germany and the rest of the euro zone? For this to be the case: 
- German exports outside the euro zone would have to be substantial enough and sufficiently fast-growing. However, these exports are not more favourable for Germany than for the rest of the euro zone; 
- German domestic demand would have to be markedly faster-growing than that of the other euro-zone countries, in particular in view of the stronger growth in real wages in Germany. Household demand growth is slightly positive in Germany, but is not vigorous since real wages are increasing by only 1% per year, and business investment is declining as much in Germany as in the rest of the euro zone."