Bear in mind that I am a stress tester, and as such only have access during tests to zones up to lvl 17, so only the lowest tier crafting mats - I cannot give any info on higher level areas. Also bear in mind that some of the goals for the 2 beta sessions I have been part of have included testing out crafting, so it's possible that things may have been tweaked to encourage us to craft, and may change for launch. With that in mind...
I have run through the starter areas in all 3 alliances, love crafting so was concentrating on gathering materials, and I found no shortage (at least of the low level tiers of mats we could gather) in any of the starting areas. They all seem pretty even in that regard. Bear in mind that if you find yourself in a crowded area at the start, the nodes will be snapped up by a lot of other people competing for materials, but I found the best solution was to go back later when the initial charge had died down, then I found it easy to gather materials for all crafts in all alliance starter areas - the respawn time (at least in the beta sessions I have been in so far) is fairly fast.
Edit to add: You can also get some materials by breaking down items you find as loot or get as quest rewards, in fact I think breaking down items might be the only way to get certain materials for improving gear to the next tier up (such as honing stones and pitch). So that's also an alternative (or worthwhile addition) to gathering from nodes.