Is it smart nowadays to go to a community college first and then transfer ?

You are talking apples and oranges.

Of the kids that do transfer, they do well as the link you gave said. However most never transfer.

The UC graduation rate for kids entering as frosh is 83% according to http://accountability.universityofcalifornia.edu/index/chapter/4

If only 23% of CC kids transfer to a 4-year college (and not all of them graduate) the numbers are not remarkably similar.