Microsoft officials say the delay is necessary to ensure a glitch-free deployment of the new Xbox 360 menu system on Nov. 19, reports Forbes.

"By waiting until the spring, Microsoft's offering will likely go up against a more compelling lineup of television shows--and put its chances of instant success at risk," surmises Forbes' Chris Morris upon breaking the news.

Announced in July at E3, Xbox Live Primetime was described as a regularly scheduled game show where Xbox Live members could compete for real-world prizes. The mainstream-friendly idea was meant to compliment the new Xbox interface this fall, with the first "Primetime" show being an online version of NBC's "1 vs. 100."