Sharing internet, is it capped??

I can't figure this out.

I'm sharing via my iMac to my PS4. Sharing iPhone USB to the PS4 with the ethernet. It works fine.. it's just half the speed or slower. I have a 40Mb connection with the iPhone 5 with LTE, but only able to download at about 13Mb on the PS4.

Any advice, suggestions, etc., to speed that up?

 

Ok, sorry...

I have my iPhone tethered to my iMac. That is listed as iPhone USB in the Sharing settings.



The USB connection isn't really limiting me that much at all. I get 35-40Mbs down and 8-13Mbs up while tethering via USB.

When I share that connection via wifi, the device using that wifi spot is only getting 13-15Mbs down and 1.3MBs up.

I hope that clarifies my problem.