Yeah, I don't think pressure treated wood is supposed to leach much at all. However, be aware that the copper used to treat wood, while a plant nutrient in small/appropriate quantities, can be very toxic to plants at higher quantities. If it's some cheap lumber and your plants start to fail after some weather, I would be suspicious.
That being said, I know plenty of people build their raised beds with pressure treated lumber and never have issues. Personally I wouldn't, but I also don't mind replacing my beds every 5-10 years when the untreated cedar rots.