I'm no tactical Ted or ACE/ISA/SAD/SAS commando but I did watch a Youtube video of Tactical Response's James Yeager saying he doesn't care for tactical fore-grips or the Magpul style;
www.Magpul.com .
I can see valid points for both sides. In general, Id want a fore-grip like a Crimsontrace or SIG Sauer Stop-Light for dynamic CQB events or spec ops.
For general carry or PMC type details, I wouldn't want the fore-grip on my "main ax".
I do think the current US Army issue(white light, bi-pod, grip) is a slick piece of kit.
CF