I saw a couple Achilles surgery videos after Kobe Bryant went down with the same injury and never once saw any drilling going on. One of the doctors they had on ESPN Radio and TWC Sportsnet (Lakers station), Dr Klapper, said how new sewing techniques they have for this type of injury allows athletes a great chance of returning, compared to many years ago when it was basically career ending. If I remember correctly, regarding Kobe, he said he would probably lose an inch or so from his vertical leap.
Here are two videos:
WARNING: they are a bit graphic.
Sorry it seems the videos have embedded...I don't know how to undue that. I just pasted a link to the video.