Well, I tried pressing some fresh buds today. Actually, just one bud. Not as messy as expected, But does require some dry time to collect.
The yield is very poor because the bud is just too soft and over flattens, even when pre-compressed into a pellet. The taste is pretty terrible, most likely too much chlorophyl leaching out.
However, it does allow one to sample the high, which could prove useful in gauging desired harvest date. That is the only reason I can think of to ever do this again!