Both youmu's and yuyuko's focused speed are 1 star, just like reimu and yukari? Unless you meant faster unfocused speed, which ofcourse feels rather fast if you're not used to it. As for bomb returning, you get one with 2 or fewer bombs IIRC, it happens a lot to me that I end stages with 1 or 2 bombs and I get one extra, it's perfect for no-death runs.