I mean I guess. But I don't see WBPF as their first "serious" release. More so a perfect segue from GSOI to what they are now.
I understand what you're saying, but I always thought of it as their first serious release, or at least their first indication of taking the band more seriously. GSOI to Upsides is a complete 180, but when you stick WBPF in between it makes perfect sense to me.