  In previous work universal behavior was conjectured for the behavior of the
logarithmic terms in the entanglement entropy of intervals in 1+1 dimensional
interface conformal field theories (ICFTs). These putative universal terms were
exhibited both in free field theories as well as a large class of holographic
models. In this work we demonstrate that this same behavior in fact is realized
in any holographic ICFT, significantly strengthening the case for the
conjecture.
