Document TCP RTO vs QUIC PTO

draft-ietf-quic-recovery.md

@@ -230,11 +230,11 @@ more accurate round-trip time estimate (see Section 13.2 of {{QUIC-TRANSPORT}}).
 
 ### Probe Timeout Replaces RTO and TLP
 
-QUIC uses a probe timeout (see {{pto}}), with a timer based on TCP's
-RTO period computation.  QUIC's PTO period includes the peer's maximum expected acknowledgement delay (max_ack_delay, Section XX),
-instead of using a fixed minimum period.  Unlike TCP, which collapses
-the congestion window upon expiry of an RTO, QUIC does not change the congestion window
-and instead sends probe packets whenever the timer expires.  This is
+QUIC uses a probe timeout (see {{pto}}), with a timer based on TCP's RTO
+computation.  QUIC's PTO includes the peer's maximum expected acknowledgement
+delay instead of using a fixed minimum timeout. Unlike TCP, which collapses
+the congestion window upon expiry of an RTO, QUIC does not change the congestion
+window and instead sends probe packets whenever the timer expires.  This is
 similar to TCP with F-RTO, but it does allow more packets to be sent when the
 congestion window was not fully utilized when the probe timeout expires. Though
 this is slightly more aggressive than TCP RTO, it's less aggressive than if the