Still may not be a big deal but after you drive over it a bit and then you get a warmish day can become crazy slick from all that compression. Especially if you get back to back days of above freezing during day then below at night.
Sorry if I'm stating the obvious but WiFi speeds will be significantly less than wired so the speeds you're describing are likely accurate and normal.
Also I checked that router model online and it is 600Mbps. How far is the router from the TV?