Different Pushing Options for different email accounts

[MyNL822]

Alright, I have noticed that there are different options to make emails be pushed to you. There is an option to have Live get email immediately, but Gmail doesn't have that option the fastest push a Gmail account can get is 15mins. Why did they make different accounts have different pushing options?

 

[DBDev]

It is due to Google not supporting the same standard that MS uses, and they don't want to collaborate.