Jumping back to the boundaries on Fae and the limits of Literal requirements on statements to be true: We know that their statements do not have to be perfectly literal or perfectly true.
1) They can be honestly Incorrect, as with the infamous "She Lies" bit at the end of GS
2) They can be open to degrees interpretation, as when various sidhe have called Lea the 2nd most powerful Winter fae next to Mab, despite the existence of Mother Winter
3) I contend they can also be wildly skewed by perspective (which may no really be district from #1). My example here is when Lea described Mab as being on par with an Archangel; by all objective measures (and WOJ) we have this is simply not correct, but if you add on the sort of Absolute Power Mab holds over all Fae, between her Will translating to Winter Law and her sharing the ability to Draft all the Wyld-fae when necessary. To a fae there is a lot less of a gap between the Mab and an Archangel than there might be to something outside of her Authority.