"Office 2010 sales are growing faster than PC sales," said Helm. "That's a mirror image of what was going on last year," he added, referring to very strong WIndows 7 sales late in 2009 that prompted a jump in computer sales.

Helm said that one contributing factor to Office's recent gains was business upgrades. "I think that there are a lot of small- and medium-sized businesses that have gotten behind on upgrade, and decided to go with Office 2010," he said.

Microsoft, however, mentioned strong sales to consumers several times during its earnings call.

"Office 2010 is the fastest-selling consumer version of Office in history, with license sales over 50% ahead of Office 2007 for the equivalent period following launch," claimed Bill Koefoed, the general manager for investor relations.

In a filing with the U.S. Securities and Exchange Commission (SEC) last week, Microsoft said that while Office 2010 sales to businesses still accounted for the majority of the suite's revenues, consumer sales had increased by 49% compared to the year before -- more then three times the 15% growth rate of Office's business sales.