There's got to be a first time? Again, considering his prowess in long TT's this is simply to be expected. And he's transformed about two years, so here we have his first short TT classification. We can expect more and that's just basic statistics.
Name a top level TT specialist who never win a Prologue or ended really close. It's bound he gets a few more.
And before anyone starts, that holds true before and after epo. A TT specialist almost always does well in both short and long events. Surely there will be exceptions (Mottet???), but generally someone who is able to win a long TT will finish short in a prologue somewhere along the line.