I agree that most folks on this board never thought Lance would make it into the league, but if you proposed that Lance would be a D-Leaguer for a few years and would get a couple 10-days, people might agree with the possibility of that happening. Getting a 10-day and then finishing half a season with a team? Not so much.
It is awesome that the dude has gotten this opportunity. If he sticks next year I'm tempted to say I'll buy his jersey.
Before his call-up, Lance was regarded as a top prospect in the D-League primarily because of his hustle, defense, and great personality. Everyone in the D-League liked him personally and thought his motor and tenaciousness was enough to be deserving of a call-up, despite some of the limits of his size/build/athleticism. He was considered a top-5 big man in the D-League during much of his time there.
I think it stands that the D-League is still the best opportunity to to get seen by NBA scouts, call-up or not. For guys itching to get a training camp invite (like Lance did), the D-League offers a way to showcase yourself to scouts every week. Props to Lance for really taking advantage of that opportunity.