Have in mind the strike was only for 4 hours, so no cancellations could be expected anyway, only delays.
According to FR statement on their website 9 out of 36 departures In Germany this morning have been delayed and that they are happy Ryanair pilots did not follow the call for strike of the "Lufthansa (VC) pilots Union".
What I could see is, that 3 of 5 flights out of each Hahn and Weeze had significant delays until after 9 am, one in Cologne, one in Berlin and one in Karlsruhe/Baden. Frankfurt seemed not to be affected.
According to German press and on their website, VC states they are happy with the outcome. They say the vast majority of the pilots employed by Ryanair that were called to strike were striking and almost half of the flights that could be affected by the strike had significant delays. The flights that operated normally were operated by contractors, who were not called to strike. In Frankfurt they state, most of the pilots are still in probation, so could not strike without risking losing their jobs. They say their plan was not to cause major disruptions short before Christmas but to show Ryanair that they can mobilize employed pilots of Ryanair, which they say was succesful.