I've just tried now some Rosetta code examples. Most of it had to be modified a bit to get compiled with this Nim version although. (adding types, change case of type names)
Used -d:release --opt:size, then strip, Ubuntu 16.04 64 bit. The binary sizes:
The binaries are dynamically linked only to the common standard C prog. dependencies on Linux: linux-vdso.so.1, libc.so.6, ld-linux-x86-64.so.2
(Except for the gtk2 example of course, which uses libdl to to pull in a large bunch of additional gtk dependencies too...)