Absolutely - the only argument for outsourcing should be "Will it save me money and/or improve quality of my IT service deliveries"."IT is not a core business, so outsource it" looks like a myth to me.
Even if the answer to this is "yes" it needs to be done in the right way by a company who really understands the clients needs and puts forward a realistic proposal. The profit margins on outsourcing are far lower than the traditional IT/consulting business, so the company who makes the lowest bid may not be the right outsourcing partner in the long term.