EMC isn’t involved with the 20% Unified Storage Guarantee it’s committed to it.
So much so that the calculator has been revamped (It’s now simpler and more efficient. Har Har) and there’s a new whitepaper up on EMC.com.
Remember, if EMC Unified Storage isn’t 20% more efficient on day one EMC will make up the short fall.
No tree killing pages of caveats.