Google Play Music All Access question

I have Google Play Music on both my Galaxy Nexus and Nexus 7, however I've noticed the settings are different for the two devices. Only on the phone version can I set streaming quality to low in order to minimise data usage. I can't do this on my Nexus 7 - which leads me to my question. Will Goggle Play Music on my tablet only stream at high quality thus sucking maximum data? This is a key question because I often tether from my phone that has a data cap of 2.5gb per month.