It's just too early for GPU mining. XDAG project is in a very early stage, so early that can fail even before getting to a single exchange and we may end up with a bunch of useless coins.
What is the need (apart from greed) of releasing or letting run a hidden GPU miner by a few people? It should be available for everybody, what are you scared of? it will be the same, only few people can afford expensive cards, GPU rigs etc.
The mining rate we had before GPU came in was simply perfect. There were powerful and humble wallets, but everybody was able to mine something, now only the greedy can. Yenten project is more genuine in that aspect.
I don't know what will happen, but this project is very interesting, and i want to learn about it.
There is a public gpu miner in development, crying won't make it to be released sooner. If there is already a gpu miner (nobody knows if is true, just rumors), is a private development, and is not going to be released.
How can you compare yenten with this coin? seriously? This coin is going slow, but is being development from the scratch, that is why everything is so slow. If you compare the profit of mining to one or another, maybe, but yenten is pure crap/scam, which have no development, is just a fork, and the only development it have is edit readme/html files
https://github.com/conan-equal-newone/yenten/commits/master it has no future in any aspect.
edit:
https://conan-equal-newone.github.io/yenten/index2.html wtf?

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Edit2: I don't know if is possible to change it, but whould be interesting to keep this coin as cpu-minable only, without gpu/asics