I don't type using 10 fingers

So it's not the thing that stops one from going to div1 or to orange

Even people who yous "10-finger blind typing" often do not do it with all 10 fingers since pressing a single space with two thumbs feels unnecessary.

I think over time you will start typing pretty fast, which is good enough, without explicitly going and learning to type fast.

I think 10-fingers typing technique is not that useful in typing program code compared to typing a regular text. The keys have their positions according to symbol frequency in language. Look at the '{' and '}' symbols, they are not that necessary when typing a letter. However in c++ program they are quit frequent. So regular 10-fingers technique cannot be applied to coding, at least it should be modified slightly.

Not REALLY, it's just... umm, fashion?

Well, it will save you a minute or two when writing average 60-lines code. However, it does not seems to be useful when slow-typer is taken twenty minutes less to come up with the right solution than ten-fingers-typer.

It is definitely not necessary. For me, it is always the case, when I try to type as fast as I can (I can do it ~2 times faster than I usually do) then I make many more bugs than I would if typed with my standard speed. Fast coding is not about fast typing. It's about writing good code and not making bugs.

Size of solution for div1D/div1E often does not exceed 1-1.5k of characters. If you are typing really fast — it is 2-2.5 minutes of coding. If you speed is only 100-150 cpm — well, then it is ~10 minutes. I am coding much faster than 150 cpm, but i'll be very surprised to solve div1 D/E in 10-15 minutes:) In most cases you don't solve problem because you actually don't managed to solve it, and not because you had no time to write a solution.

You need just some basic typing speed, it will be enough, usually solving problem is much harder then typing a solution:) Problem solving contest is not a typing challenge. And there are lot of guys who can type regular text with speed ~500 cpm, using only 4-5 fingers — which is faster then lot of people do while using all 10:)

There are also lot of ways to speed up producing of source code in programming — shortening defines, copy-paste, autocomplete and so on. Are there any videos of Egor coding available online? I guess — you'll be surprised:)