Tabby:

Don't worry about it. Others have mentioned the relationship of frame geometry and material to the rider, but if you're looking into a bike with suspension, the suspension is usually adjusted to respond to your body weight, regardless whether you weigh 95 pounds or 295.

Swapped my old hardtail MTB for one of those full-suspension cross-country bikes this past weekend, and got quite a lesson in hydraulics before I left the LBS

Tom