Random thought floating through my head during my workout this morning: how fast can I get stronger? I ask that specifically, not just "when will I be strong"--literally, how soon will I see strength gains from a specific workout?

For instance, this morning I did a lot of shoulder work: strict presses and push presses, among other things. This Friday I have a little mini-competition in which I'll be doing a lot of heavy jerks. Would it be silly to think that my workout this morning will have a positive effect on my abilities Friday (assuming I take adequate time to recover and eat to build muscle over the next four days)?

Just wondering about the time relationship between X and Y, where X is a particular workout, and Y is a particular gain in strength.