Okay so what Mbps should I expect on wireless

I am on the ultimate plan. Up to 150mbps down. The wired connection is getting about 115mbps (not near 150 by the way) and that is fine. I would like it to be far far closer to 150 since that is what I am paying for but I understand the "up to" disclaimer. Little miffed, but hey.

Now the wireless is a whole other ball game. I am getting anywhere from 4 - 40mbps on the 2.4 channel (normally in the 20s - 30s) and anything ranging from 30 - 72mbps (which is fine and what I expected for the most part) on the 5 channel. However, far more often it is in the 20s - 30s for both channels.

Now my question is this. 1) is the wired connection anything to complain about or is it what it is? 2) generally speaking what should I be expecting as far as wireless speeds on devices like my PS4, iPhone and iPad, which is what I use wireless on?

A few disclaimers: I am using a combination of Cox Speed test and Speedtest.net for the wired speeds. For the PS4 I am going off of the Connection Test that is built in. For the iPad and iPhone the ookla app. I am using the Dual Band Docsis 3.0 modem/router that Cox issued me. For the wired connection I am using the CAT5 cable Cox issued me. I am in an apartment so the wireless devices are never more than a single wall and 30 feet away from the modem/router.

Like I said I am not so much complaining as I am wondering whether I should complain if that makes sense. I realize you will more than likely have some questions for me as well. Meant to grab the exact modem/router info and can get that at lunch. Thanks!