I can confidently guarantee that the traditional TV advertisement has no effect on me. Astroturfing definately has an effect on everyone though.
Or an ad about an ISP with IPv6 support, at the very least it would make me check if my current ISP finally added support, and consider options otherwise.
Or one about some new colocation service that happens to open near my location, you bet I'd check out their website and maybe even pay them a visit.
(I don't watch TV, but my point stands.)