And soooooooo...uh, because things are going faster but nothing is secure, that's why you are worried?
If that's what you're trying to say, then the answer is simple...security will slow down your speed on anything most of the time. BUT! Your other router may have had a problem...we recently had to change our router because of some problems it was having (unfixable problems at that!) and had only had it for 2 months!
Be good to your favorite designer (I used to be one!) by LETTING THEM KNOW how much you appreciate their work!