We do love our glutes!Gregg Lemond used to have his saddle further back than most to engage his glutes more. It worls for me, maybe it works for you too!
In any case You always need to build your strength and stamina.
Nah for real I have to push my glutes really hard to feel any sort of burn. I used to walk 20 miles a day as a waiter so I have a lot of residual strength in my hams & glutes that helps a lot on the bike 
(assuming said Lycra shorts are padded and not just for compression)
