The paint and polymer statements tend to indicate it wasn't a bird... that's cool. I fail to see the leap in logic on the whole "drone" thing. The drones are not particularly small, especially when compared to a 208. Damage would have been extensive.... especially at 100+. It really seems to be more something along the lines of a weather balloon than anything else.
As for what a bird can do to a plane... I've seen an F-111 that hit a goose at Mach 1 (200 feet altitude). The pilot returned the plane to the base, but it was pretty much a total loss (took out all of the main body bulkheads). It missed the cockpit by 1 inch.
I've also seen a duck go through a 1 1/2" cast aluminum cone and punch a hole out the back where the aluminum was 2" thick. (once again a mach 1 bird strike). That one wasn't particularly fun to clean up.