I haven't played much myself, but I highly doubt it.
Some people will be carrying around a couple shells for hairy situations, people with several t10 tanks and a huge savings account will be Rolling around with a lot of them and some idiots will load up completely and go bankrupt in a couple battles then never do it again.
Gold ammo doesn't give that much of an advantage if the person you're shooting at knows what he's doing, anyway, all gold ammo changes is the entry value