I started my career in IT by joining a firm known to hire mostly grads from UP, ADMU, and DLSU. It's true that when hiring fresh grads, they have an advantage over less known universities, even more for grads from the province. When actual work starts and the playing field evens out at the office, school is not a big factor anymore.
However, when I am hiring experienced resources, their college is not a major consideration for me. I look more for skill, attitude, and maturity.