What meno was talking about was just 1st vs 2nd round picks thats true.
Another way to look at this would be to consider the order the WR are drafted regardless of round and Kupp was the 7th WR selected that year.
Its still maybe too soon to judge these players careers yet, which is why I suggested looking at guys from 5 or more years ago.
I recall workdog did a career VBD analysis where he structured it this way instead of by draft round. There were some spikes there that show just the randomness of doing it that way, but I found it interesting.
Here is what that looked like for the WR.
This data is 5 years old now, so it covers the time frame I think we are interested in.
OK, let's start with 2015 and go back to 1990. That gives us a 25 year sample size, and allows for any late bloomers. Broken into groups of 32 (the average draft round), here are the number of WR's who have reached WR1 status:
1-32 - 38 of 104 = 36.5% hit rate
33-64 - 25 of 109 = 22.9% hit rate
65-96 - 15 of 115 = 13.0% hit rate
97 & later - 19 of 493 = 3.9% hit rate
If we include those who reached WR2 status...
1-32 - 59 of 104 = 56.7% hit rate
33-64 - 39 of 109 = 35.8% hit rate
65-96 - 28 of 115 = 24.3% hit rate
97 & later - 31 of 493 = 6.3% hit rate
If we include those who reached WR3 status...
1-32 - 75 of 104 = 72.1% hit rate
33-64 - 45 of 109 = 41.3% hit rate
65-96 - 37 of 115 = 32.2% hit rate
97 & later - 52 of 493 = 10.5% hit rate
It's very obvious that 1st rounders do better than 2nd rounders overall, that 2nd does better than 3rd, and so on. One thing to keep in mind though - the earlier a WR is drafted, the better he is expected to do. If you are a 1st round pick and only make it to WR3 in your career, you are considered a fantasy bust. A guy like Mohamed Sanu isn't looked at as a bust, even though his highest fantasy finish in 8 years is WR29. That's because he was drafted at the end of the 3rd round.