Tim tam facts:

The name "Tim-Tam" came from the name of a winning Horse in the Kentucky Derby.
Women are by far the biggest consumers of Tim tams.
Most Tim tams are consumed while watching TV in the evening.
Tim tams are, by a considerable margin, Arnott's most popular chocolate biscuit.
Around 30 million packs are sold each year - nearly 300 million biscuits, or two packs for every Australian.

The Melbourne Age, http://www.arnotts.com.au