If a student manages to get into a top university as a transfer student, what does it tell you about him?

Lets say a student did so so in High School due to difficulties in life, but In college he shined and did outstanding, so well that he applied to a Top UnivUniversity for his final two years of college, if he gets accepted, what does that tell you about the student?

Also, do transfer students at top universities have less opportunities than the ones who have been there for a while?

No, they both have the same opportunities. Your resume and transcript will not say community college. You will only have your bachelor degree granting institution. You only suffer socially in college as a transfer student. You meet most of your friends in freshman and sophomore years because you take generals etc. The final two years are your major’s coursework. You can still make friends this way though.