A posting at Inside Higher Ed has noted that:

In recent years, as federal agencies have shifted the grant application process online, Mac users have complained about being treated as second class citizens. This year, as the National Institutes of Health shifted its process to the Grants.gov online submission system, glitches have further frustrated Mac-wielding scientists. Grants.gov is an outgrowth of the President’s Management Agenda that seeks to have all federal grants exclusively online.

Many academic scientists [have] said that the government didn’t know its audience when it began with a Windows-only system — and changes have not gone as well as many have hoped. While Mac users may be in a minority nationally, there are parts of academe where their numbers are far from small.

In an e-mail from his hotel in Washington, where he was reviewing grants for NIH, Richard J. Bookman, executive dean of research and research training at the University of Miami’s medical school, said that, of the 25 scientists in the hotel with him, there were 13 Macs, and 12 Windows laptops.