Ad spending soared at Twitter and YouTube in May, while they dropped slightly at Yahoo and Facebook. Twitter dollars jumped 95%, while YouTube was up 43% compared to May 2012. Yahoo fell 4% and Facebook was down 1%.
The figures come from combined spending by four large holding companies — Aegis, Havas, Interpublic and Publicis — representing about 60% of total agency spend.
Total digital dollars for the top-20 digital vendors in May were up 42% versus last year, according to Standard Media Index (SMI), which monitors actual booking data at the four large groups. Digital had its largest one-month year-over-year gain since August 2010.