Hi Bird, now clamps are something I do know about, I was in the tool game for 35 years and as a rep and Manager for Irwin Tools for the last 23yrs.
The clamps you linked to are what I call general purpose and will do for general holding and clamping when you want to cut and drill etc, if you want gluing clamps step up to the Irwin XP range, far greater pressures achievable.
If you are going into gluing boards together for table tops and furniture assembly you can't go past pipe clamps, sash clamps or t bar clamps, far greater pressures again due to mechanical advantage of a threaded mechanism.
Regards
Pottsy