"If you are unchanged after hearing a professional speaker, then I think the speaker has failed. If a facilitator hasn't added their knowledge and experience to the discussion, they haven't worked hard enough for their fee. If you leave a training session not feeling more confident and more competent, then ask what didn't happen - you or the trainer."
The compliments I most value in speaking and facilitation are the ones that say I helped people look at things in a different way. It may take evidence, humour, rigorous logic, or presenting a completely different perspective to achieve that, but the challenge is always to move attitudes, perceptions and opinions.