I found Sls has overseas attachment for students (Yale summer programme) provided from Sls website. It is so attractive for me to send my boys to overseas for free.
rough estimation
in 2011, 63 AL students, only 46 get into local U ie 73% ( screened after HKCEE) so it is quite impossible for 7x% DSE student enter local U thro' JUPUS .
If 7x out of 170 DSE student, in 2012 enter local U ie max 79/170=46.4%
I would guess it is not only include the JUPUS, but only HD/Asso/private U or oversea ( 46 compare to 7x )