Randomly looking at some of these, I see the Javascript 5x5 calculator has you performing a set of 5 with your current 1RM by week 16 or something. One of the Excel files on workout 27 has you doing 5 reps well above your previous 1RM after 4 other previous ramped sets of 5 (none of which are terribly light and one of which is a set of 5 with your previous 1RM).
These types of calculators are generally based on a specific type of athlete that they commonly get. A beginner might do a lot better, an elite lifter would blow the program in short order. This stuff is not universally transferable. It's nice to look at and if you are close to the type of person they usually get and push through cookie cutter routines, it might work well for you.
The take away should be planning and incrimental progression over time. However, the best programs are made for specific individuals. That can only be done with knowledge on the part of the coach (i.e. how to program training) and then experience with a specific lifter and specific programing (i.e. where does he stand now at this moment in time). Unfortunately there are no shortcuts.