Maximum AC wifi link speed?

I've been searching for a while and i just cant seem to find the answer. I just upgraded from an AC 1200 to an AC 1900 router. My note 4's wifi link speed on the AC 1200 maxed out at 867 mb/s. on 5ghz which is the max for AC 1200.

Now with the new router it still only connects at 867mb/s and not the max link speed the new AC 1900 router should provide.

I know it dosent matter, has nothing to do with why i bought the router and is plenty fast enough... but it's bugging me.

I just want to know if the N4 tops out at 867mb/s? Has anyone gotten anything higher for a link speed?

thanks!!