http://www.higher-faster-sports.com/noglutes.html
A similar article that hits some of the same points.
Hip flexor tightness has been a huge issue for me and I’ve spent the last month stretching it daily. It was so bad at one point that everytime I would squat, clean or deadlift my hip flexors would ache and feel weird. To the point that I think it has been holding back my strength gains in those lifts as well as a possible speed detriment. Thats bad. Anyway, after this month of pure stretching I can start to feel my glutes being recruited more in those same exercises as well as sprinting itself. Lets see what another few months will turn out.
Good article. I personally am a big fan of all the glute activation/strengthening work.