RE: Whey + sugar
table sugar is glucose and fructose known as sucrose.
dextrose is just glucose absorbed very very fast.
maltodextrin is a longer chain carb but is STILL very easily broken down and wil still be absorbed very fast.
glucose is good for PWO the fructose is not so good as it takes longer in the body to be processed an broken down.
I personally see there being more point to this than mixing dextrose and maltodextrin which are both processed very quickly.
Overall table sugar (sucrose) is good and will do the job. This is what I actually use (unless I use lucozade).
I would also used dextrose, but sucrose is just so convenient.