Yes. Dell said that one third of Netbooks are shipping on Linux.
Also, contrary to Microsoft COO's claims that Linux netbook returns were 4 to 5 time higher than Windows, Dell confirmed that the returns are the same as Windows!!
and here: http://www.theregister.co.uk/2009/08/12/dell_reality_linux_windows_netbooks/
Dell says one third of Netbooks shipping on Linux