I lived in San Diego for the last two years and this article doesn't make much sense to me. They say the problem is that Sorento valley is to far from San Diego downtown but downtown is dull and there are plenty of good places to live not far away from Sorento valley (Del Mar, La Jolla, Pacific Beach). I commuted from North Park to the UCSD campus which is close to Sorrento valley and it was no problem at all.
[1] http://www.gonctd.com/wp-content/uploads/Schedules/Coaster-S...