Very nice especially the backlit #1
I would welcome seeing the fuller EXIF for them i.e. what ISO was 'picked' and whether for example in the case of the #1 whether and how much +EC you dialed in to avoid the silhouette & with which metering mode?
The highest ISO for this group of shots is ISO800, unfortunately with auto ISO you can't dial in EC, so what I tend to do is switch metering modes to suit (evaluative, spot etc)
I recently got the 7D (upgraded from the 40D) and always take RAW, I have found the images more challenging to PP as there is noticable noise even at low ISO but as posted in the section a short while they do yield well even at ISO 3200. So more work on my part to improve the PP.........................what do you do to get the quality you have shown above?
I think one of the ways to keep noise under control is to 'nail' the exposure, but that applies to most cameras not just the 7D, I was looking at a mates images from a 5D MKIII the other day, on a couple of images , the exposure was way out, there was a lot of noise in the shadows, even at a relatively low ISO (400).
On high ISO images, I tend to selectively use noise reduction, like on some of the above , I used quick mask in PS to isolate the kite and used NR on everything but the kite.
Incidently I see the new v2 firmware due in August will allow for greater control over Auto ISO and I see that as good thing