I doubt you're overtraining
I've been doing a high frequency routine for the past 3 months, lifting a max in the squat, push press and deadlift every day
I do not feel overtrained, I am not tired or fatigued, I am not sore either. In fact I feel very refreshed and energised and if I take an off day I am always itching to lift.
Everyone has an intuitive idea of what "recovery" means and how "hard work" relates to that, so I understand why people are skeptical -- I know I was when I first really considered the idea -- but in truth, I've always found the intuitive notions to be...well, not so intuitive. If you think about it (and I mean really think about it, without the lifetime of dogma interfering), there's really nothing outrageous about training hard once or even twice a day, every day. The "you can't do that!" response is more a matter of perspective and tradition than any real biological reason.
Daily training isn't a year-round thing for me as I have no reason to do it without end, but it remains a tool in my kit -- and more importantly, even when I'm not lifting daily, I still find that my mentality is no longer centered on the question "what can't I do?", which in my ever so humble opinion is far more important than the program or method you choose.