What is minimum throttle servo speed and at what point will the increased speed not be noticable? Like will I notice going from a .10 to a .07 ? Thanks

it will be noticeable, i use a .09 and seems to be perfect for throttle

Be aware that speed is not the only information you want to know.
Brands can mention fast speeds but you have to look at the angle too!

A servo with a speed of 0.1sec over 60 degrees is like 0.07sec over 40 degrees and there are brands using 40 or 45 degrees for their speed.

But if you have a fast framerate radio (like Futaba HRS or Spektrum 5ms framerate) you will notice the faster the better.

and mmostly that are the times without any load..
take a brand like Thundertiger DS1015 or a hightec and the times will hold with load..take brands like hmm Turnigy or bluebird and the time will fall when u got some load on the arm

Racing or Bashing?

Racing .09 as stated above is pretty perfect

Bashing .13-.15 will do you just fine.

if the .10 is 15 kg and the .7 is 8kg.Then i think i would use the .10
if you understand what Im saying

SO anything faster than .09 you will not notice it in a buggy?

Yes, I second.

A servo with less speed but more torque may be faster in the long run... because a less torque servo may slow down under high load. It's a weird inverse relationship kind-of-deal. You must have the perfect balance of speed and torque.

So now we are down to speed and torque. I got it. I was wanting to use a low profile and save some weight. LIke the savox 1251 .09, 125 oz-in, weight 44.5 gs. I heard get at least 100 and some say 150 oz-in torque for throttle and .09 was the ideal speed. Right now I have the AE 1015 .109 speed. Just want something faster. What do you guys think, would that savox servo work? I use to fly alot of airplanes and also used this trick for the throttle.