"neat idea of something to do for fun or with a small child it has a novelty"... that is how I would classify it; but then I am a commercial grower. As for the Meyer, it depends a lot on what kind of citrus tree pollinated it to make the seed. The Meyer itself is a hybrid of lemon, orange, and mandarin; and when planted from seed, you could conceivably get any one or none, or a blend of these. I once planted 500 Meyers from seed and got a wide variety of trees relative to shape, size, etc.; but while my grafted Meyers produce fruit in 18 months, the seedling trees did not produce a single flower in 4 years. For lots of good information you can Google "growing citrus from seeds".

I don't know how "true" they are, but I have had my most vigorous Citrus seeds from those of the sour/bitter/Seville orange and Pomelo.

'...There seems to be a lot of misinformation on this subject ...'

I guess is depends on who is giving you the information.

It's a rather complicated subject. Any citrus can be grown from seed. Most come true, but not all, and in some varieties, some may or may not come true, depending on whether a zygote was created, and whether it survived inside the seed.

My understanding is most citrus can grow true from seed. But there are exceptions -- a few being Clementine mandarin, Temple 'orange', Persian lime, most pomelos and likely numerous others.

Read up! There's actually quite a bit of reputable information online.

You might want to start by Googling 'citrus nucellar embryony' or 'polyembryony in citrus' for starters. Or order a good book on how to cultivate and propagate citrus.

A couple of good choice.

Key lime ==grows fast and fruit early after starting.

Calamondin grows from seed and flowers early in life.

Meiwa Kumquat slow growing but often flowers at under 2 feet tall.

In general the smaller the fruit the easier to get early fruiting

Sammers, I sprouted a bunch of baby key limes and one Lisbon lemon...all are growing well but still tiny. It's funny how there are definitely some seedlings that are bigger/stronger than others...natural selection at its finest! I would start with a key lime or calamondin if I were you...who wants to wait 5-10 years to get fruit?? Not me...;-)