While googling EC2 i saw a few unanswered questions about ec2 being slow. I found this which says your EC2 instance may run for a second or two then stall for just as long:
the catch with the micro is 2 ECUs for short periodic bursts...
a micro-instance [may] run fairly fast for [a short while], then slow down
Is there any truth to that? If i have one reserved instance and it is the only instance of my website would i get slow performance?