... Gretzky was only of above average straight-ahead speed. But I never saw anyone more agile and balanced on their skates at the time, especially when handling the puck. He could handle the puck on his backhand like it was second nature, and throw in a tight turn or a 360 degree swivel that would screw the rest of the league into the ice. He had tremendous balance, where after spinning on his backhand, he could simply step past defensemen who were checking him, because they were busy regaining/recovering their balance. His lateral movement was amazing and almost effortless. His balance was so good that he could lean away from a hit - like a boxer, he could move just enough so that a hit that seemingly was dead-on turned into just a glancing blow. Wayne had a magnificent stutter-step that would put defenders back on their heels, which in turn gave him more room with which to operate.
The danger of his shot was, in many cases, multiplied by the goaltenders' absolute inability to play him. Gretzky never looked at the goaltender - he looked at the hole the goaltender left, and the goaltender always left something because Gretzky's backhand shot was as good as his forehand. And, if a top corner needed to be picked, no one picked it better than Wayne while on the move and leaning into or away from the shot. Gretzky changed edges so well and so quickly; he could make a backhand pass and be on his forehand and ready for a return pass in an eyeblink. He always kept a tight grip on his stick when he was killing penalties or on the power play, so he could cradle softly even the hardest desperation clearing attempts - so he was forever ready to start the transition game, either by himself with a breakaway or to one-touch it ahead for a teammate. His stick blade was always on the ice, either to accept a pass or tip a shot. The praise for his playmaking genius is well-deserved, but I don't think Gretzky will ever get enough credit for simply executing fundamentals.
Gretzky's genius was to make order out of apparent chaos ... while defenders were scrambling back to establish their defensive positions, while his teammates were trying to find open ice ... Wayne was able to pick through all of the movement and anticipate and seek out the best option, whether it was finding a teammate or making the play and taking the shot himself. Everyone knows he had his "office" behind the net, but he had a "branch office" along the left wing boards, where he could quickly run through his options and hit a guy in stride with him or coming into the play late. Nobody found and exploited open ice faster or more efficiently than Gretzky did, and since he was always thinking a couple plays ahead, he seemed to have an instant answer for anything the defense tried to counter him with.