I wanted to hug Scootaloo so badly, in this episode. She takes such a verbal onslaught from Diamond Tiara and Silver Spoon, and as Peach
noted, Silver Spoon's becoming more and more like her "friend." She definitely needs a new one.
I like that this episode directly addresses the chance that Scoots will never fly. She seems to have just enough wing power to hover a few inches off the ground, but it seems very unlikely she'll ever achieve more than that. This also makes it that much more important that Rainbow Dash validate her as normal and accepted, which she does quite admirably.
Also, right at the end, I thought "they're about to get their cutie marks!" only to be fooled.
Damn you, guys. Quit that!
Overall, this was a very good episode, the new song is great, and we get a nice, heartwarming slice of life story. Solid "A" from me.