Hey, just thought I'd mention this: as @ats-david pointed out above, @wang is not actually front-running. It's just a display bug on steemd.com. If you look at the block itself, the votes are actually recorded in the right order.

In any case, @wang's votes do go in extremely fast, almost always being included in the same block as mine. I have several other vote-followers (@masteryoda and @roelandp are two examples), and their votes are cast seconds to minutes after mine.