So I have the 5S and the iOS 7 Jailbreak came out the other day. See one problem though is that mobile substrate and preferenceloader don't quite work with any 64-bit devices. Anyway, the whole point of the question is if anyone knows any information on excatly when those two very important Cydia packages will be optimized for the 5S/Any other 64-bit devices.
I wouldn't expect a patch anytime soon. If you read the twitter strem of @saurik you will see that the author of substrate wasn't given time to work with the team that released the jailbreak and that there are at best - strained relations and differing motives and at worst, possibly a disengagement of iOS 7 patches for some time.
Read through the posts up to 24 dec for more of the back story of what doesn't work and why.