Earlier quoted context omitted.
I believe you're wrong. This is how WhatsApp USED to work before they were acquired by Facebook. Remember how messages used to stay in the waiting (clock) state and you could delete them if the recipient wasn't online? Well now the first tick appears immediately because there's an intermediate server storing them for delivery and they can't be deleted from the client. It's similar to what Microsoft did to Skype.
The first tick appeared immediately since I'm using WhatsApp which has been long before Facebook acquired them.
And? That just means the recipients you were texting had a reliable connection to the internet at the time.