viennajs long talks are long

hi, there are different sides to this

1) a long meetup is long
2) as an organizer i'm happy about every talk
3) speakers have a right for feedback and there should be time for discussions
4) everything in the physical world has a 20% failure rate

ad 3) the speakers are the real heroes of the meetups, they invest time before the meetup, they prepare,
they stand in front - of a quite critical  - crowd (which is easy for some, which is unbelieveable hard
for others, they do it anyway, cudos). so thumbs up for every talker, you are awesome. 

ad 2) currently we have a lot of speakers, and i'm very happy about this. but i also know that there
will be a time when there will be only one talk ;( it's not a question of "if" but of "when"

ad 4) 20% to 30% of all announced talks won't happen. that's ok, that's life. life is what happens while
you make plans. so if we would limit to 5 talk (and announce them), 3 will happen. 

this leads us to nr 1) a long meetup is long

i think it's not about the number of talks, but about the fact that our brains shut down after about 2 1/2 hours.
so basically what i would say. if we have more than 5 talk, i/we should be very strict about the length of
the talks. 15 to 20min, 5 min questions. 25min max.

if we have 4 to 5 talks, we can be more relaxed about the lenght of the talks and the lenght of the feedback/question round.

said that: talks, talks, talks, i'm looking forward to what you come up nexts. every talk is awesome in his own right
(as long as we see some code)