These two questions are actually tougher for me to answer than you might think, considering that I am an organic devotee. I used to trust the organic label more BEFORE the government and "big business" got involved than now.
Much of the organics at that time were locally or regionally grown and if you had concerns, you could go visit the farm in question. Now it is shipped in from all over the country and possible even outside and the integrity of the organic chain is much more blurry.
Shipping also brings its' own issues such as growing products that ship well, have longer shelf life and therefore may not be as tasty as those grown locally, that usually reach the consumer in one or two days max.
Also, the longer they sit between picking and eating, the more nutrition seems to be lost so is it worth the extra price?
Yes, IF the organic certification program is well monitored, because synthetic, and questionable insecticides are are excluded. Yes, IF the plants are healthy from natural soil additives, healthy soil and good farming practices.
Not so much if the variety of plants grown are chosen for shelf life and shipping "toughness". Not so much if they have taken 5-7 days to reach the store and lost nutrient value as well as flavor.
Here is an interesting study done about organic "perceptions". http://www.dmnews.com/earth-day-consumers-less-likely-to-shell-out-green-on-orga...