I think looking at overall corner stats can be a bit misleading. Just like the title of this thread, which is about throw ins.
Back to my point, however,
overall corner stats can be misleading. You have players who deliver excellent dead balls and a majority who are average to poor. If you average them out, you'll conclude that corners provide paltry returns. However, if a player hones his skills to deliver excellent corners all the time, I would have to believe that the percentages that
@milo quoted would be higher. Lamela is a good example. How many assists has he gotten from corners compared to how many he has taken? If anyone has those stats, they'd be interesting to see. As well as stats on any other good corner takers.