Skype has a beautiful and very strong visual identity. Things start OK on the first page of this presentation by its COO at CES 2009. Then the color coordination gets weaker. Off blue. Pink's too bright. No greens (Skype's green "call" button is very strong visual icon returning in the monochrone rainbow).
PowerPoint templates go beyond page 1.
I am sure Skype's template is OK, the default colors are probably not set in such a way that they are easy to use for people without a degree (or passion) in graphics design. Like in almost all corporate PowerPoint templates, too much screen real estate is devoted to the brand/logo. With its strong blue colors Skype could actually afford not having a logo at all on its presentation pages. People will recognize the company regardless.