With this character, 72wd/66s/62d, I did all the yellow quest on only the wd. I started this character after ch4, and with no xp bonus other than the occasional sigil dropped by a mob. The first xp short fall was in sjf. If it was not for COO and xav, I would have encountered a couple of the lower xp shortfalls. There are short falls in aslan valley, ystra, and savage lands, but with COO and xav, those are not noticed anymore. I did not do any dailies on my primary, the wd, but used those for the scout and later druid.
The lvl 57-64 range is where I had short falls. After that it was strait all the way to the cap of 72 with yellow quest.