The answer is so far in a theory called Cooper Pairs. These pairs of electrons avoid obstacles and resistances by working together and aligning with lattice phonons that represent the vibration of the lattice they are traversing. Super-conductivity is an example of ultra-efficacy and is the image in nature of the Autopoietic Symbiotic Special System. That special system shows how the symbiosis between the two electrons and their environment of the lattice of the conducting material can work together to produce zero resistance. This is an anomaly in nature. It was discovered by accident and it took 20 years for them to come up with a theory how it might work.
The explanation given in the question, is not correct. It is the interaction of the paired perhaps entangled electrons and the phonon vibrations in the lattice that produces the effect which is to avoid any imperfections in the lattice that might provide a source of resistance. Also we are talking about electron flow from atom to atom, which is more like a wave in water, than an actual movement of electrons. It is charge that is moving not the electrons themselves. And this is supported by the atoms in the lattice but does not really involve the nucleus as such as far as I have read.
There are three special systems in Reflexive Autopoietic Dissipative Special System Theory and cooper pairs is the one analogous to Superconductivity, which is an anomalous natural phenomena that demonstrates the existence of ultra efficacy (hyper-efficiency and hyper-efficacy). The other special systems are analogous to Solitons and Bose-Einstein Condensates. These are the Dissipation Ordering Special System and the Reflexive Social Special System respectively. These special systems appear both in mathematics as anomalies and in nature as anomalies. See http://works.bepress.com/kent_palmer for more details on Special Systems Theory, also http://about.me/emergentdesign