Ok maybe 2300 but not 2100 or below
The kids does some bad and some fantastic tournaments. Andreas Garberg Tryggestad and Tor Fredrik Kaasen are all over the 2100-2400 ratinglist. I think Tor Fredrik dropped all the way down to 1927 right before Oslo Chess Festival, and then he suddendly jumped to 2389 and took an IM-bite. He took fifth place , behind three GMs and in front of 5 GMs and a lot other players.
http://tournamentservice.com/standings.aspx?TID=OsloChessFestival-Masters2016-NordstrandSjakklubb_2
Depends on the time control, in a long game forget it even a 2300 stands no chance in hell. In blitz you can also forget it unless you're at least 2300 strength. 1300 is a disgusting rating and only inches away from being almost beginner level.
I think a 2300 has good chances against a 2700. The 2700 more often will win, there will be a lot of draws, and some times the 2300 will win. Imagine the 2700 playing with black against the 2300. Not easy at all.