I'm in Australia and I get 10mbit/s sync with ADSL2+ (there is a NBN fibre bolted to the side of my house, but no light in it).
- 4 VoIP lines
- 2 people working from home, copious calls/video calls.
- My 33TB NAS gets data from somewhere
all runs from it just fine.
I could use 100mbit or faster better than most, but realistically I start to struggle thinking about what I'd do after 20mbps or so, and any more than that is just doing silly crap with it.