Oh I don't care about "being better" but I've raided in environments where if you weren't in step with other healers, you weren't doing certain things correctly. Example: I raided with a really hardcore 25 man group towards the very end of Cata and I was below the other r sham, not by much, but I got "talked to" cause riptide wasn't at 100% every single fight(mind you we were on farm content too), even if it was around 95% that wasn't good enough D: I ended up stopping raiding with them 'cause I had already been through being more or less "perfect" for progression and I don't think needing to be "perfect" for farm content is necessary if bosses are being killed within 2-4 minutes. It was never fun to raid 'cause I was constantly worrying about having perfect uptimes on everything
So I guess 'cause of that experience, if I see a major hps difference, I tend to think it's something I'm not doing or could do better.
But no, progression isn't really an issue. Most trouble we've had so far was Garalon, but it was more of a strat issue than a healing issue. Once we sorted out a strat that worked for us, we got it down.