Here is my take:
1- Starstruck- 5 years later and I am still awaiting for my Kaluta sketch piece. Book was 4 years late.
2- Collectors book of Virgil Finlay- delivered on time (Excellent)
3- P Craig Russell Sketchbook Archives- delivered on time (or very close to it if I recall correctly)
4- The Art of Ploog- delivered on time reward was published art
5- Kros (Ostrander/Mandrake)- Book about 2 years late- reward was published art
6- Nexus Compendium- Book was not and never will be completed. Was offered something else as a substitute but no refund.
7- Hexer Dusk- (Ostrander/Duursema)- Book almost 2 years late. Still being worked on. Probably at least 6 months from being sent to backers.
8- Drawing Beautiful Women- Frank Cho- book delivered on time
9- Of Dust and Blood (Val Mayerik)- Book on Custer- very, very later (2 years?)
10- Dave Cockrum Futurians- Book very, very late (2 years?)- got OA as reward
11- Tim Truman Scout- pending
12- Simon Bisley sketchbook- pending with Sketch
13- Jim Starlin Artbook and Novella - about to be shipped- just the books
14- Ploog volume 2
15- Jill Thompson Scary Godmother Doll- (just the doll)- 4 years late.
Quite surprising as many of the creators had worked for the big two publishers and had excellent track records in getting work done in a timely manner..I am going to say that in general, when there is little to no work to be done by the creator, the book gets done on time (art compilations). When the creator has to write and/or draw the book- usually there is a long, long wait............. and the communication seems to vanish. Very disappointing, in general. The best ones have been the Ploog,book, the Cho book