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Have a look at 'WMM' at Wikipedia (http://en.wikipedia.org/wiki/Wireless_Multimedia_Extensions) and you'll find out why this may be more than coincidence
The Intel 5300 is a dual-band wireless adapter and I do believe the DIR-655 router can only do th 2.4Ghz band. This could mean that the connection can only get speeds up to 130Mb/s.