They said the following in the comments box:
"Universal averages show typical wear levels for this type of engine after about 4,500 miles on the oil. You've gone longer than that already, and your wear is still in the average range, so you'd have no problem running more miles on this fill, We do usually recommend changing it when the dealer says to while you're under warranty, just to avoid warranty problems if anything should come up. Not that we expect anything to--this should be a terrific engine for you"
I usually change the Subaru syn. oil every 5k, this time I want to push things a little bit so I went 7k.