Was I supposed to get a new router with gigabit?

Hi all,

  A tech came out today to install my gigabit service, but he said that he was told not to give me a new router. Anyway, my speeds are 100/100, not the expected 1000/1000 like other people seem to have. He installed a new ONT, but the router is still the ActionTec MI42. He said I can get gigabit speed with that router, but that router is OLD. I don't know if it supports gigabit or not.

  Before I call, can someone tell me if I should have gotten a new router?

Thanks