Coloration is an extremely variable trait in darts, BUT size of adults is not. Rob, do the frogs in your collection vary this much as adults? As mentioned before, a Frenchy compared to a Cobalt is huge. I don't house the smaller individuals with the larger, hence I have no side-by-side pics. You're right, Rob, you can't base a frog's identification solely on looks alone. But you also can't expect to trust an importer's interpretation of where so-and-so was collected either. These frogs are wc, plain and simple. This means there are no boundaries from which they could have been collected. Our best identification tools are the ones in which we decifer what characteristics separate different morphs. We can get a good idea of where the frogs originate, but that location must be taken with a grain of salt, since the animals could have been collected 50 miles downstream.
If we're not careful, we're going to start blending lines in the hobby and we'll end up with mutts. Pumilio, yes. But mutts all the same. There's a fine line between what is variation, and what is a significant morphological trait. We need to keep a keen eye out for these differences.
On another note, Kinetic is exactly right, the froglets I posted in the classified section are F1's from the smaller group. F1's from the larger group are expected soon.