If you double click a variable name in the source that is a component of a derived type, VS selects past the percent sign on the left but not that on the right! It would be better I think if it stopped for both sides. It seams to have got changed in XE2013 update 5. In update 3 select stopped on both sides.
Para obter mais informações sobre otimizações de compiladores, consulte Aviso sobre otimizações.