Hey..... they are both right. The image absolutely has been sharpened. You can see it form the highlight on her leg -that is a big sharpening give away. Also the pattern in the original looks like sharpening because all the colors are extremely contrastie. But it also looks like you did a more then 1 stop push on processing. Again, a lot of the RAW tools will do both of these automagically for you. I never let the conversion tool do any sharpening if I can avoid it.
Lastly, you don't need 1/500 for the shots you got. You can come down to 1/250 easily for all three of those shots. Any really fast motion shots may have some issues particularly if they are in a sideways motion from you. But other then then, cheer has lots of posses, and those you can go really slow with as long as you are stable with your camera or are using IS.
Cheers - and good luck with it.






