IIRC, from back, way back on the old RM mailing list, the ICE folks at the time said something to the effect that the training times were purposely made long.
For one thing, nobody was expecting them to be taken after character creation, so the times were used to adjust the character's starting ages.
Secondly, taking a Training Package also gave other potential benefits (sometimes even possibly a magic item).
But, no, those times are not typos, those are what ICE wanted (when the books were originally published).