No, it does not. Again, look at how differently dolphins and bats USE echolocation. The individual ways they function demonstrates that they are NOT all the same mutations that lead to the use of the same function.
Your source does not say that they would need hundreds of "the same mutations", just that both carry the same hearing gene necessary for echolocation. That doesn't mean the same thing.
Again, you were comparing this to feathers in mammals, but it is nowhere near the same thing, because the form both take is specialized in different ways and functions entirely differently. As I said before, all this demonstrates is that similar traits can evolved independently. It doesn't indicate anything about ID.
EDIT: Looking into this even further, to say this study showed that 200 mutations were "the same" is a misrepresentation. The study says that 200 genes had independently changed
in the same ways, which isn't quite the same thing. Essentially, what's it's saying is that both dolphins and bats evolved the ability to "hear" echolocation using a similar set of genes that evolved in a very similar way - but that doesn't really indicate anything other than that independent selective pressure can give rise to similar structures. It's a intriguing example of convergent evolution, but to posit that it indicates (or necessitates) and hand in the process beyond natural selection and random mutation is baseless.
SOURCES:
Bats and Dolphins Evolved Echolocation in Same Way
Genome-wide signatures of convergent evolution in echolocating mammals | Nature
Obviously no, as I have said and explained this repeatedly.
Oh look, you're wrong.
Your argument was that the EXACT SAME MUTATIONS occurred in both. Since the forms they take are entirely different, obviously they cannot be the exact same mutations, can they?
Okay then. Please show exactly what mutations occurred and the likelihood of them evolving independently. Show your working.