How do you figure? After you have so many hours (which is a number easily attained in a year) you only have to send the transcripts from the CC. You do NOT have to send your high school transcripts.
If you check most colleges (im just speaking from the majority of schools in my home state), if you attend 1 year of CC, and get a 4.0, it is NOT enough to transfer to an IVY league or Top tier (just using it broadly as an example). They look at your Highschool Transcript and your SAT scores. They request it with the application because you are fresh out of highschool, and this is what they look it. (trust me, im a freshman planning to transfer, and all req's i have seen require this, at the schools im looking at)
Lets consider some cases: (these are just hypothetical examples)
Student X gets into NYU from highschool. X can't attend because he cant take out a loan, his parents wont do it they have a lot going on and he is 17.
Student X goes to a CC, and then applies for transfer to NYU, because now he has turned 18. NYU not only requests his college transcript, they want to see his SAT scores and his GPA. They also see he has gotten accepted before...so they know they can probably keep him in the pool as he is/was a competitive applicant.
Student Z on the other hand has terrible grades (arguably) for top tier. Z has 3.0 gpa and 1550/2400 SAT scores (hes the average student).
Student Z goes to a CC, and then applies to transfer to NYU. Just because he has a 4.0 in CC doesnt mean hes the most competitive applicant around. 1 semester of college does not tell you anything, where as 4 semesters does. So when NYU requests his highschool transcript and SAT scores (you can check nyu website to see it is what they require) they will most likely not place him in the pool for students who are considered because his highschool grades and SAT scores shows he does not have the type of numbers they are looking for.
I just gave a very dull example. Obviously by no means do stats determine everything. Essays, EC's etc.. are main factors as well. IM just trying to back up what i said in order to answer your question.
Now ofcourse when ur at the 4 semester level, they probably just want to see ur HS results and SATs just for the hell of it, as they will put more emphasis on ur 4 semesters of college.
But at the 1 semester level, i cant imagine that being the most weighted factor in their acceptance decision.