A small specimen is not going to produce large flower heads like you would see on large specimen.

Than how do you explain bigger panicles on smaller specimens which I also have

Maybe it's just different with each plant? Mine had small panicles also

I've found that small panicles grow out over time, even though a lot of the flowers are open already. I wouldn't worry about it.

Don't mean to change topic but how about sniping flowers? Should I do it or shouldn't? The above tree is more than 3 years old, the trunk around 6 cm dia at the bottom and more than 185 cm tall. I'll try to provide a pic of the whole tree later.

Stanofth, are they in pots or in ground?

today I have noticed that most of the microscopic mango fruit sets are yellow color while only a very few are green. Do you think the yellow ones are the more prone to fall/drop?

That's pretty normal, the yellow are finished , only the green are good. Although mangos produce huge masses of flowers, very few fully develop into fruit.

Mine are in ground. I had a Manila that sent out beautiful and colorful large panicles. I posted a photo of that on Dave's Garden years ago. Later that same year,it just shriveled up. Either a pathogen or gophers .

The Baily's are nothing to brag about in looks..but the tree is a fast grower ~2' to 8' in 5 years in ground in my mild summer climate. That's rocket growth for here.

It is true that letting them fruit when small can really slow up growth. Its up to you to decide if you want to have fruit to pick now or..a larger tree putting all its energy into growth and branching with a few more later. Tough call.

Here's my Baileys Marvel in the not tropical climate of the bay area.

I let a panicle fruit and the two others snipped. I want to snip off the last panicle too but the fruits are growing, now dime size almost. Is it worthy to snip it off now to let the roots grow or am I too late because of the fruit's size?

You can trim off with no harm whatsoever to the tree. I might cut off a couple on mine. Mangoes really put ALL their energy into the fruit. Unlike hardy fruit tree's..young Mangoes( for me in the bay area) stop all leafy growth when in fruit. So a whole year can go by with little to no growth. Leaving a weaker tree in winter. I'm hoping when it gets larger that will end as a problem.

One of the panicles on my tree was broken off...that one branch has a nice flush of growth. That tells me I shouldn't let the whole tree go to fruit.