They might feel something but it probably is not from their Test levels going up. I really don't care if I get blasted for this but....some Test boosters increase libido and make you feel better but that is about it.
SERMs have side effects and that is why you don't see people running cycles very often and they can hurt libido. BUT, they WILL increase your Test levels....fact. I have some clomid at home left over from an AAS cycle and have actually considered lately the idea of running clomid for a month to increase my Test levels.....but I keep coming back to this fact, Total Test does not necessarily equal better results in the gym and in bodybuilding.
Test levels are not the be all end all that everyone thinks they are......if we all had our test levels checked, we would probably be surprised at the hardgainers with high test levels and the built guys with low test. I just think that there are a lot of genetic factors that combine to give each of us our muscle gaining potential.
Sorry for the long post......I would love to hear others' opinions on this....hopefully someone with more formal education in these areas....the above is just what my gut tells me and the little research that I have done.