  Results based on a generic jet-energy loss model that interpolates between
running coupling pQCD-based and AdS/CFT-inspired holographic prescriptions are
compared to recent data on the high-p_T pion nuclear modification factor and
the high-p_T elliptic flow in nuclear collisions at RHIC and LHC. The
jet-energy loss model is coupled to various (2+1)d (viscous hydrodynamic)
fields. The impact of energy-loss fluctuations is discussed. While a previously
proposed AdS/CFT jet-energy loss model with a temperature-independent
jet-medium coupling is shown to be inconsistent with the LHC data, we find a
rather broad class of jet-energy independent energy-loss models $dE/dx=
\kappa(T) x^z T^{2+z}$ that can account for the current data with different
temperature-dependent jet-medium couplings $\kappa(T)$ and path-length
dependence exponents of $0\le z \le 2$.
