A 35mb loss right next to router isn't right. I'm literally 5 feet from my router on my phone and get same speed wireless that I do with a cable on my pc.
What I have connected is my MacBook Air about 3 years old, Windows laptop about 1 year old, and iPhone 6s about 6 months old. All are much newer than the router. When I open my AirPort utility, it shows 88:03:55:32:32:AD:1D connected to my router along with my other devices. Not sure exactly what that is.