I think it traces back to the fact the newcomers and hire guns at a lot of UK sites tend to get given DPM for the day as it's so prevalent, so the regular players tend to stay away from it in an effort to differentiate themselves, which results in multitudes of american-camo'd airsofters, but DPM done well can look good.
I'm not a fan of hanging slushy machines and coffee makers off the front end of your rifle, but I like this one...with one exception. Why would you need a forgrip with a bipod? Personally I'm a fan of just resting my hand on the mag well, unless it gets too hot. I guess if you absolutely had to have both though, I'd pick up one of these www.israeli-weapons.com/store/… instead of having them separate. Remember ounces = pounds, pounds ain, so the less gear the better. My hate of forgrips aside, great photo lol