I have been in the hobby nearly 30 years, and I have ran Regular Fluorescent, VHO, HALIDE, and T5. I am now running LED. Your statement is clearly not backed by science, rather anecdotal evidence of what you may think is happening. LED does in fact match halides in intensity, and can be manipulated so delicately in spectrum that no halide can compete. I can ramp up my fixture with control of not only intensity, but also spectrum. There is NO HALIDE that can do that, Period.
I am a firm believer in the concept of "pictures or it didn't happen", so I invite you to take a look at my previous tank, it was first lit by halide, then T5. My current tank is only about 3 months old in its current location, so all I have is frags, but in 6-8 months, this new tank will rival my old.
Take a peak for yourself:
Mike LaPorte (PerfectPix)'s Photos : Aquariums | SmugMug