Well here is my honest opinion:
SCC is killer when it comes to speeds. Anyday. TL, IPT and others cannot beat SCC when it comes to speed.
People talk about low seeding speeds, for them I gotta say, get the irssi working and check the upload speeds to the TV/Movie packs. I actually hit 88MB/s for a solid 40 mins until my torrent was finished.
MP3, 0DAY and the Archives section is completely freeleech, which makes people with home broadband connections maintain a descent ratio.
With over 200 MP3 releases every day, and each of them being freeleech, one cannot argue much. :P
Coming to the TV and Movie packs. If you ever want a pack of seasons, say for The Big Bang Theory, you'll always find them, and moreover, your download won't be counted at all!
Yes, I love TL too, as it indexes a variety of P2P releases, which everyone loves.
But if you ask me, no SCC is not at all overrated.