I upload my share of pictures too but, even if there's quite a few, it doesn't take very long, even with less that a 4Mbps upload speed. I suppose if you are uploading a mass with hundreds of photos, then you could use the fast upload speed.
Now if you're talking about video, especially anything of an hour or more in length, then it could take a long time unless you have a fast upload speed.
I'm sure that there are those out there that could really benefit from a faster upload speed, I'm just saying that the majority of users don't need nor care about it which is why ISPs tend to provide fast downloads and mediocre uploads.