I hadnt heard about this...and I'm slightly affiliated with a dive shop.  So I asked around...it seems that no one was told this.  The BSTPO might like to think they did something...but they certainly forgot to tell the operators.

It doesnt matter really, we all knew about the weather well before it hit.  And besides, it was perfectly fine to dive the otherside of the island all day - during the supposed 'warning time'.  Kite boarders were out in force too.

BSTPO made a claim that wasnt true; if they warned anyone...it wasnt any of the 7 dive shops I asked today.