I think what was mentioned before was diminishing-returns timers where if you have 1 guy on grid it takes a really long time, is easily doable in less than an hour with 20 dudes, and peaks around 50. Then sov war is more about the actual fight between two entities regardless of how large they are or whether they have a supercap fleet or not. It also makes grinding undefended space much more easy.
So essentially you fly what best counters the hostiles you're invading instead of needing a supercap fleet or dreadnoughts or whatever to grind through an ihub. Sorry if I'm incoherent; it's 5 am and I just finished an LoTR marathon.