Is there a way to kill vills faster on Voobly?

I don't know why but I'm having a problem on Voobly that I don't face on HD.
When I want to delete villagers I have to press the 'del' button but it seems like on Voobly there is some kind of cooldown for this button.
Indeed it doesn't matter how many time I click the 'del' button, the game kill my vills only one vill every few seconds... and I press the 'del' button multiple times in the between. For 2-3 vills this is nothing but when I have to delete 20 vills or more this become frustrating and make me waste a lot of time, indeed sometime I send the vills I want to delete straight to my enemy TC so he will kill the vills for me. It's not faster as they have to travel across the map, but at least I can focus on other things.

Anyway I would like to delete vills like I do on HD, any idea what's the problem here?