No, SSD machines do not have SMS.
Above image taken from - http://support.apple.com/kb/HT1935
For what it's worth, I took a 2012 13" MacBook Air fired up a movie and proceed to give it a pretty good shake. The machine never stopped playing the video or audio and never skipped a beat.
Random addition which serves no direct relevancy to the original question outside of searching/archive purposes. Apple lists "SMS" on the following MacBook Airs -
1.) MacBook Air - MacBook Air 1,1
2.) MacBook Air (Late 2008) - MacBook Air 2,1
3.) MacBook Air (Mid 2009) - MacBook Air 2,1
I suspect that these MacBook Airs had this feature due to the fact that they came with non-SSD with the option to upgrade to an SSD. The SSD was not considered standard until the Late 2010 models, at which point SMS is no longer listed as a technical feature.