I wouldn't go that far. Intel definitely has an advantage in process technology, but it's not as though they rely on it exclusively to stay ahead. For example, currently the AMD and Intel CPUs in the server market are both at the same level of process technology, 32nm, and Intel's CPUs are still overall superior.
Ivy Bridge still hasn't been released in the server space. The server market currently has Sandy Bridge chips. The Ivy Bridge chips are due at the end of the year.