How much extra throughput do you find?
I cannot predict how much increased throughput you might have. I can only say that on my 2.5Gz Jumbo 9014 instead of 250 GBytes/s, I'm seeing 280 MBytes/s.
Note: Also see Sweet Spots at the end of the Article.
It depends on the size of data you’re transmitting. Large files, like blu ray or 4K rips transfer in a fraction of the time that they used to. Lots of small files will have less of an impact because each file copy will have the same amount of overhead. But there should be less backup/buffering.