Snail's pace?
This event has been occurring yearly since 1389!
That's SIX HUNDRED YEARS!
Lourdes was approved as a place of miracles in less than twenty years.
I'll pray to St. Januarius and allow the Napalese to have their tradition.
I'm still suspicious.
Heck, they didn't even clear Joan of Arc's name for 400 years--be patient!
The church moves like that because it is such a sensitive issue. If the church hasn't decried it as a falsehood in all of these years, my guess is that it's safe to say that they are authentic, and would cause no harm for you to believe in the graces recieved from petitioning the good saint.