From my perspective, they are developing their web browser at the absolute minimum rate necessary to avoid a precipitous decline in its market share - not fast

From my perspective, they are developing their web browser at the absolute minimum rate necessary to avoid a precipitous decline in its market share - not fast enough to avoid a decline, but not so slow that it would vanish quickly, and certainly not fast enough to add value to internet standards or web application performance. I'll only come around to your view when they stop dragging their feet in hopes that Silverlight hits an inflection point.