I have noticed the same thing to some extent. It seems like in more than any other game type the lobby will be filled with children screaming, or kids with broken thumbs running around with riot shield, fast hands, c4 and or shock charges. YAY! It can be annoying, but can also make for some good fun. When you find yourself in a lobby that's a joke, throw on a fun class and entice the squeakers into raging. Then every once in a while I find myself in a lobby with people who's SPM is 110+ like mine, and know what they are doing. That is also fun, but if you always want intense Search action, go hardcore, or play league/scrims. Or don't play search... that's generally the route I take.