Enhancement: M-x (+lag+) command

[Ypo]

When I send M-x and I start to write a command, I write it down to the buffer 
where I have my text, instead of to the new buffer where commands appear. 

So, after I send M-x, I have to wait some time, and then I can write the 
command. There is a lag between M-x and command inputting availability. 

Couldn't this lag be neutralized? For example, by recording every sent key 
after M-x and pasting them down when the commands new buffer is available? 

Greetings,
Ypo