Google has been making a play for the mobile internet market, and it appears its efforts are paying off.

The company said on Tuesday that it has seen an acceleration of internet activity among mobile phone users in recent months since it began offering faster web services on selected phone models.

"We have very much hit a watershed moment in terms of mobile internet usage," Matt Waddell, a product manager for Google Mobile, said in a Reuters interview. "We are seeing that mobile internet use is in fact accelerating."

Waddell told Reuters that the growing availability of flat-rate data plans from phone carriers, instead of per-minute charges that previously discouraged internet use, along with improved web browsers on mobile phones and better-designed services from companies like Google, are fueling the growth.

Citing the same factors, Juniper Research predicts annual revenues from mobile search services to hit $4.8 billion by 2013.