This seems to be saying that, (and please Matt correct me if I'm wrong) if a tutor costs 2U, and the card it's fetching costs R, you'd have an easier time fighting with the opponent over 2U than over R. I will agree that in some cases, it is easier, but also I would like to add that in some cases it's actually beneficial to let your opponent fetch a cheap solution to lull them into a false sense of security and over commit, using it right away by walking into daze or mana leak. It's a very interesting topic though, and I'd like to have more discussion on what the correct types of plays for these situations are.
That is exactly what I'm saying, and something Saucemaster talked a bit about. I'm not sure I see the situation you're talking about though, could you give an example?
Actually, something of an example that HAS happened in a game before:
I pass the turn with library, and volcanic untapped. EOT, he mysticals finding ancestral, then brainstorms into ancestral. he has 1 mana left open. He goes for ancestral. I activate library in response. Then I daze. He forces, I force back, and suddenly, he lost a tutor, ancestral, brainstorm, and 2 cards in hand. I lost a daze, and 2 cards in hand. At that point, he over-committed into his ancestral.
This is really the kind of example I'm thinking of, as his tutor for ancestral cost UU, and he immediately attempted to use the ancestral, bleeding himself of resources.
Aaron