The data comes from The League app which actively promotes itself to those you have been told they are too picky or have too high of standards. Generalizing online daters based upon data from The League might not be appropriate.
Having said that, a quick google for any comparable data set doesn't seem available. So while the limitations are important to keep in mind, for now, this is the only data set that I'm aware of. My approach is to take it with a grain of salt, but not to completely ignore it.