After adding all the sets on Reply #6 on up, I've found that this list has 14 sets of 5.
Five seems to be the average number for most-parodied products at this time. Originally, it was between 5 and 6.
And, as mentioned above on Reply #21, Cap'n Crunch currently has the highest number of releases at this time with 25, and Wacky Packages is now a close second with 24 (although Bazooka, Reese's, Tootsie Roll, Planters, Hot Wheels, Dunkin', Kit Kat, Snickers, Butterfinger, Pepsi-Cola, Play-Doh, Garbage Pail Kids, Frosted Flakes, Kool-Aid, Charms, Pringles, Raisin Bran, Crest, Mr. Clean, 3 Musketeers, Milky Way, Ring Pop, Spam and LEGO are all slowly but surely catching up to it with 21, 15, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10 10 and 10, respectively). Also, as mentioned above on Reply #37, Gadzooka Bubble Gum is the most individually released Wacky of all with 28 (including one that was unreleased).
Always remember, though, that all of these figures are both subject and more likely than not to change at any time, of course.