One thing I noticed - last year we went on a weekend and their were long lines for the wine seminars/tastings that are free. This year went on a weekday and walked right in, it was about 3/4 filled. My personal opinion is Food and Wine Festival is more enjoyable during the week with the smaller crowds. Less lines at the food booths, better chances to find someplace to sit and you don't have to dodge so many people while walking through the crowds with a drink or food in hand.
Phrank