Yes, significantly so. If you think about it, a lot of your expended energy is being lost through 'vertical' movement when what really makes you go faster is 'horizontal' movement. The thicker tread tyres on your mountain bike will also slow you down due to increased rolling resistance.
The Dyno mountain bike with full suspension and disc brakes is called "Fierce" I had one myself. It was an amazing bike!
One cannot actually purchase a full suspension for a mountain bike. However, on the online Amazon website one has a large variety of full suspension mountain bikes to choose from.
No.
It is used to reduce the force of impact on your bike and body and instead places it on springs or air in your suspension.
A DH bike is heavier, stronger, has a slacker steering angle and plusher suspension. The XC bike is lighter, more responsive, weaker and has less travel in its suspension.
Full suspension mountain bikes can be purchased from local motorcycle or ATV dealers. Shoppers can also look at businesses such as TrekBikes, PerformanceBike, and Jamis Bicycles.
Not really. There's no hinge for it, and no place for the suspension to go. You'd basically have to cut the bike apart to create the hinge to allow the suspension to move, and then you'd have to build the attachment points for the suspension. It's really not worth the huge effort it'd take.
Dual suspension is a bicycle with both a suspension fork and a suspension rear. A rigid bike is a bike w/o any suspension, both fork and rear triangle are stiff.
Pivot is simply tech speak for a joint, or a hinge. For a (suspension) MTB pivot usually refers to the point(s) that the rear suspension moves around.
No bmx is supposed to have suspension
A full-sus MTB will have both a sus fork and suspension for the rear wheel. A Hard Tail MTB will have a sus fork but will look like a regular bike in the frame, with no suspension for the rear wheel. "All-Mountain means that the bike is light enough and sized well enough to be able to be ridden uphill while still being strong enough to hold together for a decent downhill run.
On downhill trails hardtail mountain bikes are harder to control, vice full suspension. So improve your skills by getting a hardtail.