Originally posted by proudtoshootpentax High flash sync speed is something not usually needed... even a 1/90 sec shutter speed with a flash will not produce blur, because the exposure takes place in the 1/10,000 of a second that the flash is firing in. Slower shutter speeds actually allow in more ambient light, and many times a better looking picture. Even a 300mm lens won't blur with slow flash sync. Where it does become a problem is outdoors with bright light when you're using your flash as a fill and your exposure time tends to be higher. In that case, turn down your sensitivity, stop down the lens, or add ND filters.
flash sync speed is the number 1 on the list of features that people do not understand. You see the users that understand what it does and they complain about the slower-than-all-the-competition sync speed of the current Pentax dSLRS, and then you see the ones that do not understand it that will say things like "thats no problem just use HSS on the flash!".
Your approach is new though
Maybe the people who designed the canon 350d was thinking like that. In Av mode on the 350d, you will always be in slow sync mode. (unless you disabled it in the custom menu).
Although you do recommend the brute force approach to fighting with sunlight, but remember that we are talking about speedlights here, they are low power, if you want to overpower the sun by force then you need a studio flash and a portable battery. if you had a p&s with a hotshoe you could beat the sun with a speedlight though.