I hope you are right! And when you find a solution PLEASE let me know! My 15 month old has been a messy eater since day one! I pretty much just tell my lil' one no too and tell her if she's going to throw food then she can get up...then I start to clean her off...and then she knows Mommy means business! It doesn't always work but they are still young and it takes lots of time and patience! If you haven't invested in one of these meal/play mats I think it would be a good idea!!!
http://www.toysrus.com/product/index.jsp?productId=3214510
And my daughter is also in a "phase" now where she really likes to throw any & everything! Especially if you give her something and she doesn't want it. And when there is something missing in the house...look in her playpen because that is her hiding spot where she throws things. Drove me crazy for a while...she puts everything in there - the house phone, cell phone, remotes, pacifiers, cups, food, etc....aren't they so cute??? Anyway, hope I helped...Good luck!