The Politics of Skyrim

[Crow]

Where is there evidence of Talos actually being a god?

Last I checked, the only aedra we ever have proof of existing in the games is Akatosh because of the oblivion crisis.

For all intents and purposes, if you are living in the game world and worshiping Talos, you receive all the benefits you would expect from worshiping any of the other gods; One example is blessings that actually have tangible results.