Also please read these helpful tips: Visual representation guidelines - The new age of visual identity
*** Web 2.0 graphic design style was introduced in 1998 - early 2000's. It was a glossy look, with lots of gradients, bright shiny 3D feel, abundant in reflection effects.
*** After 10 years of evolution brand identities have changed, entering in a new era and eliminating the web 2.0 older style.
*** From a couple years ago all the biggest companies have changed their logo to keep up with the times.
*** In 2013 effective logos are simple and recognizable, using solid colors, without multiple gradients, shadowing and shiny reflections!
*** Because those companies that do not adapt to modern visual changes often lose the competitive edge necessary to attract customers.
2013 logo examples:
http://tinyurl.com/qh3mcr5