From the article
Alan Muldoon from MBR explained that crossing over from 26 to 29 is less challenging on a shorter travel machine. Longer travel 29ers (the Stumpy has 135 in the rear, the Camber 110) take some manhandling and getting used to while shorter travel versions respond better to 26er inputs.
I just changed from an old Blur Classic (110mm) to a Tallboy LTc (135mm) and didn't have any problems with the difference in handling.