Yes, satellite will be bad for web browsing. Latency average is around 650ms, sometimes a lot higher e.g. 1000ms if busy, with 550ms quoted as absolute minimum.
Generally web pages are composed of many small files, each of which have to be requested and loaded. So speed isn't usually a limiting factor, latency of each request is. If you need to do 100 requests to load a page but only 3.3MB of data needs to be loaded then having a high minimum ping will cripple your loading times more than limited bandwidth.
Example web page bbc.co.uk broken down into requests:
If you put your mouse pointer on each coloured bar you can see the ms times it took for each operation, like looking up the domain name, connecting or loading the data.
A lot of operations will happen in parallel but whenever they don't 650ms is a large hit to take.
Satellite will be good for streaming video as once the stream is requested it can just keep sending the data without waiting for a response. Though forward/rewind might be a bit tedious.
So keep your ADSL for web browsing and perhaps get satellite for streaming and/or downloading e.g. movie/tv files. 20mbit is more than enough for all the streaming sites.
You'll usually only use the full bandwidth when downloading because streams are often limited to lower bit rates.
A compromise would be 3G/4G mobile, if you can get a good signal. You get semi-decent latency and better speeds than ADSL. So it would have the advantages of both.
Edited by MUD_Wizard (Thu 01-Aug-13 07:50:24)