"More than two million businesses run Google Apps," the company , but Google is still a long way from displacing Microsoft as the king of the business e-mail and collaboration market.

An IDC in July 2009 showed that nearly 97% of businesses were using Microsoft Office, and 77% were using only Microsoft Office. Nearly 20% reported extensive use of Google Docs, but not at the exclusion of other tools.

Google's adoption figures have likely risen since then, but even Google's marketing has at various times described Google Apps as a technology that is complementary to Microsoft Office, rather than one that could completely replace it.

There was some controversy recently when Google reportedly began out of its own offices in favor of Linux, Macs and Google's own forthcoming Chrome OS.

But Sheth says numerous Google employees still use Microsoft Office and have no plans to switch.