I'll move this thread down to our Canon
Forum, since it's a camera specific question. Some of our Canon shooters may see it and give you some tips.
But, that sounds about right for speed, depending on your drive mode (single shot, continuous) and AF mode settings. Once you get to a certain speed card, the camera is going to be the bottleneck with most cameras, not the speed of the card. Your shutter speed can also impact it (and you'll have much slower shutter speeds indoors). Other things like lighting and subject contrast can slow it down (since Autofocus speed can impact it, depending on your settings). JPEG file size varies by content, too (so file sizes will change depending on subject type, conditions and more)
If you read through your camera's review conclusion here (which is the last page before the samples in each review), you'll see camera performance discussed (startup time, cycle time between photos, AF speed, and more).
Here's an excerpt from Steve's review conclusion discussing cycle times in various modes:
" In Single shot mode, the S5 IS captured 8-megapixel Superfine images at the rate of one every 1.3 seconds without flash, and between 2.4 to 3.5 seconds with the flash, depending on subject distance and battery life. There's also two continuous or burst shooting modes, Continuous and Continuous Shooting AF. In Standard mode, I was able to capture images at 6/10-second intervals; the viewfinders briefly displayed the last captured image between shots, making it difficult to follow a moving subject. In Continuous Shooting AF mode, shots were captured at a slower rate of 1 second intervals, but the autofocus system acquires focus for each shot; between shots, the viewfinders briefly display the live image"