Hi! Joel,
I tried (literally) the same ping command on one of
my networks with a rooted tablet, and got the exact result you note.
Then I tried:
on my other network with an unrooted phone and it worked fine.
There are several possible variables. My wired router (the no-go)
was set up to block "ping-packets" as a security measure. There could
also be some differences in how ( and which) busybox was installed.
I also recall reading something recently (as you did ) about 'ping'
requiring privilege on newer Android versions, but several apps on the
Play Store preport to offer 'ping' results.
I hope this is of some help. I don't see Digest responses right away,
so possibly you've gotten more exact answers already.
Good luck,
James Gere