I bought the laptop from best buy, here are the specifications
http://www.bestbuy.ca/catalog/proddetail.asp?logon=&langid=EN&sku_id=0926INGFS10123851&catid=28239
and this website claims that it does have 5 GHz feature
http://www.atheros.cz/download.php?atheros=AR5B91&system=1