I wouldn't get your hopes up. Talked to denver water about this and the 2ft reduction or 4-5 weeks equates to about 90 cfs. Most of the water released will likely be captured and stored in spinney res downstream, so it won't likely impact flows in elevenmile and cheeseman. Also, antero will be drawn down during may, and runoff usually doesn't start up until late may, peaking in june, so barring a massive early melt, most of this water will be transferred prior to significant melt.
Upper south platte is below average for snowpack, so I wouldn't expect a big year for elevenmile or cheesman flows. The good news is, that just about everything else on the front range (except for the perrenial loser, bear creek) should be HUGE this year.