Not true. Faith is believing something in the absence of physical evidence. ID would only be a matter of faith if the premise was that there is a Designer. ID looks at empirical data and concludes that evolution based solely on random occurance does not adequately explain the complex systems present in the universe. It takes no faith whatsoever to arrive at that conclusion. ID then concludes that due to the order in the universe and the failure of complete randomness to provide an adequate explanation, then the existence of a Designer is plausible and should be considered as one alternative. It takes no faith to conclude this either.
Now, once one begins to speculate as to the nature of the Designer, one clearly enters the realm of philosophy. This is also true if one takes an atheistic approach to the origin of the universe. If faith is believing something in the absence of physical evidence, then one must excercise faith if one believes that either: a) matter/energy never had a beginning, or b) matter/energy came from nothing. Aside from a Creator, these are the only other plausible options and neither has any more scientific data to support it than belief in a Creator. The atheists I’ve discussed this with will say something like: “I am confident that science will one day be able to explain the origin of the unverse.” But, if I were to rely on some future discovery to support the concept of a Designer, I would be written off as a religious fanatic who refuses to discuss things scientifically. There is clearly a double standard operating here.
I find it odd that some people who want to discuss the deep things of science seem threatened by the potential existence of God.