Welp, I guess I was misinformed; thanks for the heads-up. As you said though, even with the grace period (which isn't expressly mentioned in anything I've read about the newest proposal, though you're probably right that there will be one), the actual activation time of the fork will vary depending on how quickly the activation threshold is reached.
Actually that isn't something that is going to take that long if there is consensus for the proposal. Miners could activate it quickly. However, we're looking at a grace period of 9 - 12 months here.
What I was trying to address were the concerns that the Core devs are looking to intentionally, "stall", the implementation of the newly agreed upon fork when in reality they're just setting parameters to increase the probability of a (fairly) clean fork.
Actually (uneducated) people think that increasing the block size limit is just 1 line of code. However, it is far beyond that and agreeing to the terms is hard. Look at BIP109 (Classic); ~500 lines of code.
That's a different roundtable.