Applied to Comp Sci but accepted undeclared anyone been thru this process and actually got into CS

My S was accepted to UCI undeclared but had applied to computer game science alt software engineering. If anyone has been thru this process can you please let me know how easy or difficult it was? I did call the admissions office who told me I needed to talk with the school that he was interested in. They connected me to the school ICS and the person that I spoke with said that there should not be a problem with getting into either of the majors I listed above. I have seen on cc different comments that appear contrary to this so I am hoping someone that has been thru this or knows of someone can shed a little more light on this? Thank you