  Current measurements of the temperature and polarization anisotropy power
spectra of the Cosmic Microwave Background (CMB) seem to indicate that the
naive expectation for the slow-roll hierarchy within the most simple
inflationary paradigm may not be respected in nature. We show that a primordial
power spectra with localized features could in principle give rise to the
observed slow-roll anarchy when fitted to a featureless power spectrum. Future
CMB missions have the key to disentangle among the two possible paradigms and
firmly establish the slow-roll mechanism as the responsible one for the
inflationary period in the early universe. From a model comparison perspective,
and assuming that nature has chosen a featureless primordial power spectrum, we
find that, while with mock Planck data there is only weak evidence against a
model with localized features, upcoming CMB measurements may provide strong
evidence against such a non-standard primordial power spectrum.
