I agree with Eq working immediately as well. I'm not talking muscle size, I have never felt like I got any size from Eq at all, but I get a noticeable effect in more visible/enlarged veins popping up at about a week into it, especially if i'm on the leaner side.
For me, i've sworn off Eq so many times feeling like it didn't do dick, but there are times when i've used it, and I liked the vein-effect so I just kept it in. I've only gone up to 900mg-1 gram per week IIRC, and I did not get much more from that dosage compared to 3-600mg/wk. I've never felt like I got much from it when trying to add LBM, but i've not used more than the doses i noted above.
Eq, since it's usually painless and does not have many side effects, outside of RBC/Hct, and it's fairly cheap....i've just always included it into a cycle as a filler drug when on a cutting phase with Test, until I get about 6-8 weeks out from my target date and start adding in stronger compounds and orals.
So like weeks 8-20 out, I just use Test or test/Eq, then i'd add in tren or Mast when under 10 weeks, then orals. By time I hit the orals and everything else, i'd drop the Eq. That was always the most effective way of using it for me...although it can pretty much be added in at any time imo.
I went OT some, lol.