Also in the amount of data.

Ever remember waiting something like hour to watch a 60-second movie preview over dialup?

I get a reminder every time I load a modern website in an area with very poor reception. Appears to not load at all —- not due to lack of connectivity but rather due the speeds and latencies being too slow for the amount of crap being fetched.

GPRS and EDGE were many times faster than dialup — must have been a dream — but now utterly unusable.

The sad part of it is, pretty much everything on that modern website that makes it too fat to load is completely unnecessary. You can create a beautiful, full featured page that's only a few kbytes.

That is indeed one of the differences I had in mind.