Since it's seniors who hire, i'de say it's pretty important whether they value it or not. And a lot don't, especially for networking since CS has almost no networking in it (by the 2nd year most undergrads still have difficulty working with binary, i.e. netmasks, cidr's, wildcards, etc.).
You might want to consider forming a perspective on this topic with some basis other "what the senior developers at my company say".