I don't see DD VE stream count documented anywhere.  I looked it up on my technical preview install.  Being it has 6GB of ram it makes sense that the stream count is similar to a DD160.  Does the stream count go up in DD VE if the ram is increased?

DD VE Streams (.5TB disk - 6GB Ram)

read=4

write=16

rep-in=20

repl-out=18

combined=16