I went back to 2010 and broke-down all SB's that didn't have a surprise team from WC round, 10 SB's. I used the 4 Areas of QBPR, comp %, TD %, INT % and ave per pass plus sack %. So 5 indicators. I'll list the records in the same order for each.
the order is INT%, TD %, comp %, ave per pass, sack rate
SU record of all 5 indicators measuring the margin, off - def = margin ..... 7-3, 8-2, 4-5, 1-8, 7-3...... ATS records are almost the same, might vary by 1 game. Worst record is ave per pass. Some had ties that's why only 9 games.
the better off...............3-6, 5-5, 3-6, 1-9, 9-1 ...... better off only did well in sack %, QB's that don't get sacked
better def .................7-3, 7-3, 7-2, 5-3, 6-4 ........... as we can see def has the better record in every indicator but sack %.
here's where it gets good............................. if we take a team better by a certain amount on defense and better by a certain amount in margin, each indicator has a certain amount.........
records ......... in the same order....... 5-1, 5-0, 4-1, 1-2, 6-0 ...........wow, pretty spectacular there in every indicator but ave per pass.
This is in SB's, I think we might see a similar results in NFC & AFC TITLE games, hopefully I get around to doing those games.
If we were to compare Eagles with the 9ers, Eagles better margin in 4 of 5 . Eagles better defense in 4 of the 5. Eagles would qualify in 2 indicators with 9ers qualifying in 1 indicator of meeting def by certain amount and margin by certain amount.
The best, more consistent team might just make itself know tommorrow with a huge effort.
Purdy did have a 121 QBPR in games he started, saw that online, he did regress last week, I'd expect him more to regress again this week as 121 if played over the entire season would be the 2cd best all-time, from a rookie in his first few starts ? Let's be real people. He does have a stacked team but let's slow down a bit. I'm still seeing so many youtube stories on 9ers unbeatable to Purdy the greatest young QB talent in history.
I just think it is more likely Eagles regress by playing back to their standard early in season and Purdy and 9ers regress back to reality.................................