Everyone I've trained and otherwise helped has experienced the same phenomenon, but the thresholds vary. I've known a few rare people that can diet lower than 10% without adding cardio, but most people can't break double-digit body fat percentages without a very strict diet mega lean forskolin and regular cardio routine. The leaner you become, the longer it takes to lose fat healthily (the key, as you want to preserve as much muscle and strength as possible while losing fat). If you're at 25% body fat, it's very possible to lose 2-3 pounds of fat per week for the first several weeks. If you're at 10% body fat and are making a run for single digits, however, 2-3 pounds of fat per week would be impossible without dangerous drugs.

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