Studies[0] show that when students use laptops to take notes, they remember less than when they use a pen and paper. The suggested mechanism by the latter improves retention is that it forces you to understand and summarize the content due to limited output speed (thereby processing it more deeply); when you are able to produce output at near the speed of input you can simply transfer words with little processing. It seems likely that this would be a shortcoming of shorthand as well as laptops. If you're taking notes in a meeting for your own use, it seems as though "longhand" may actually be the better choice (excepting of course those situations in which it's important to know exactly which words were said).
[0] http://pss.sagepub.com/content/early/2014/04/22/095679761452...