I don't think that Seljuk was drawing any particular inference. It is inarguable that for a number of years Ryanair have grounded a fair number of planes during the winter, and that this winter they have reversed this trend. In part this can be attributed to the economic recovery (ie increased demand) but credit should also be given to MAG, who have entered into a new commercial deal with Ryanair that makes it easier for the airline to turn a profit during the quiet winter months.
Evidently this has shifted the economic balance between keeping aircraft in service year-round and grounding them during the winter.
We should expect to see some reduction in these stellar growth numbers as we move into the summer season. It will be interesting to see at what level the growth rate eventually settles - if STN continues to grow at anything like the present rate it won't be too long before it overtakes MAN again!