Boy, that didn't take long.

At least two research firms upped their Google price targets to $1,000 Thursday morning, just two days after the Internet company's share price topped $800 for the first time ever. Sanford C. Bernstein cited the emergence of mobile as a significant growth driver and YouTube, which it deems as an "underappreciated asset" as the main catalysts behind its decision to lift its price target to $1,000 from $820.

Analysts at CLSA also boosted their price target to $1,000 from $900.

"We believe mobility, together with continued innovation in search such as new formats and better targeting, will support growth of search revenues in the double digits for several years to come," Berstein analyst Carlos Kirjner wrote to clients. "We also believe YouTube is already a multibillion dollar business, growing fast and with healthy operating margins, whose growth potential is not fully reflected in consensus."

For more MarketBeat and other streaming markets coverage from The Wall Street Journal, point your mobile browser to wsj.com/marketspulse.