Yep. fusel alcohols will not age/condition out like some off flavors. those 'higher alcohols' are there for good.
other aspects of the beer may mellow and subdue the fusel flavors though. But really, you've GOT to control the primary temperature.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10