Only on the cheaper or low range old ones - like the Rebel and the D60. The more expensive ones are superb. However, all is not lost. You can buy one of these:
which will not only allow you to trigger Canon speedlites remotely, but will also focus in almost total darkness. You can use it purely as an auto-focus aid and even in dawn/dusk situation it will make you camera focus a lot more quickly. Not sure of compatibility with D350/Rebel though, so please check before buying! Alternatively the Canon speedlites have infrared focusing aids built into them that will do the focus-in-near-total-darkness thing, but the remote is a lot cheaper if all you want is the focusing part.
If working in low light it's also worth considering one of these:
and pair of 1800mAh batteries to give you some hope of getting through all that auto-focus battery drain. It also gives you a second shutter button that's in the right place for portrait photography! I have one of these on my EOS 1N and it's well handy! I will be getting one for the D60 for Xmas :-)
Don't buy Canon batteries because they're expensive and lower mAh rated. I bought 2 1800mAh batteries off ebay for just over half the cost of a Canon 1100mAh battery fom ebay.
