under what rock were you living under 

ftth which is what unifi is using (fiber to the home). fiber optical broadband basically.


latency wise is way faster. a real world example...

adsl wow back in the day 600-800ms
ftth today 200-300ms

may still seem slow, but considering this example is latencies from malaysia to the US, this is as good as it gets.

you only get fast 5-20ms locally in malaysia or to singapore range with ftth.

i don't recommend playing fps games with latencies over 100ms. but games like starcraft rts, dota moba, warcraft mmorpg, diablo 3 hack and slash is all definitely playable overseas with ftth.
with ftth technology, upload can be equally as fast as your download speed. however for the unifi 30 and 50mbps packages, they decided to lower upload speed. this isn't a technology limitation, but rather a policy decision 

whereas adsl is a technology limitation why it's upload speed sucks hard 
there is just zero reason to still be using adsl in this day and age.... heck just get the 5mbps ftth if you want to be cheap, still better